📘 This is Part 2 of a 5-Part Series:
How to Build A SaaS Business In 1 Weekend Using AI
Missed Part 1? Start Here → How to Build a SaaS in 1 Weekend (Part 1)

Part 2: Friday Night

Pick your idea. Define your audience. Start showing up.

Your goal tonight

You will:

• Pick your SaaS idea

• Define a niche audience that wants it

• Write your AI build prompt

• Activate your audience system

• Start showing up before you ship

You are not building yet.
You are setting up who you help, what you build, and how they’ll find you.

Step 1: Pick your idea (10 min)

You’re not building a unicorn.
You’re building a tool one person will use.

Do this fast. Avoid overthinking.

Use this formula:

A [type of person] who wants to [solve ONE clear problem or ONE job they want done]

✅ The product must:

• Be usable by one person

• Solve one boring but useful problem

• Require no AI features inside

• Work in a browser

Examples:

• A freelancer who wants to track billable hours

• A student who wants to manage study tasks

• A coach who wants to track client notes

• A creator who wants to organize social content

✅ Keep it boring. Simpler wins.
Avoid social network, marketplaces, multi-user logic,

Still stuck? Talk to ChatGPT like your cofounder

Use this ChatGPT prompt:

Give me 5 simple SaaS product ideas for [your profession or interest]. Each one should solve a real problem, use no more than 3 screens, and be possible to build in 2 days with no-code or AI tools.

Bonus: Smarter Ways to Find or Refine Your SaaS Idea

1️⃣ Read Where People Complain

Real pain = real business.

• Reddit: Browse questions and rants in subreddits like r/freelance, r/startups, r/smallbusiness, or r/marketing.
  → Look for phrases like “how do I manage…”, “I hate when…”, “is there a tool for…?”

• Twitter/X: See what indie founders are building and what followers wish those tools could do better.

• Product Hunt: Explore daily launches. Note the tools that get traction and read comments — what are people asking for next?

✅ Use this prompt:

2️⃣ Borrow, Don’t Copy — Steal Like a Builder

Most great startups started as “borrowed” ideas made better for one niche.
This is called niching down — and it’s totally okay.

Examples:

• Stripe → PayPal, but for developers

• ConvertKit → Aweber, but for bloggers

• Canva → Photoshop, but for non-designers

• Zoom → Skype, but for remote teams

✅ Prompt for this:

3️⃣ Explore Workflows People Already Use

Tools like n8n, Make, and Zapier show what problems people automate daily — each automation is a potential SaaS.
Check n8n.io/workflows or YouTube tutorials.
If hundreds of people automate it, you can turn it into a friendlier micro-SaaS.

✅ Prompt for this:

4️⃣ Find “Messy” or Overlooked Markets

Everyone builds in crowded spaces like task apps or note-taking.
Instead, use the Blue Ocean trick — look for “boring” but profitable problems:

• Local businesses tracking clients

• Coaches managing notes

• Students organizing study tasks

• Freelancers tracking hours

✅ Prompt for this:

5️⃣ Analyze the Big Players

Visit websites of top SaaS companies (HubSpot, ClickUp, Notion, Monday, etc.).
They often bundle 10+ solutions inside one product.
Each feature could be its own standalone micro-SaaS.

✅ Prompt for this:

Step 2: Choose your 3 features (5 min)

Most people build too much.

You only need 3 working features to launch.

Use this template:

Examples:

• Add a client session

• View session history

• Mark session as completed

Or:

• Add a study task

• View daily tasks

• Mark task complete

Action:
Write 3 features. No more. No design. No extra flows.

Don’t add settings, themes, or onboarding yet. Those come later.
Build the core loop only.

Step 3: Define your audience (15 min)

If you don’t know who you're helping, you won't know what to build or what to say online.

Use this positioning framework:

Action.
Answer:

• Who are they?

• What are they stuck on?

• What result do they want?

• What words do they use to describe it?

This will drive your features and your content.

Step 4: Find the niche you’ll show up in (5 min)

Now connect your product → audience → niche content.
You will grow in a content niche, not a product niche.

Framework:

Your SaaS: helps [person] with [problem]
Your content: talks about [tools, systems, routines, mistakes, wins]

Action:
Write this sentence:

I’m building for [user] who want to [result], and I’ll show up daily in the [niche] space.

Step 5: Start building your audience (5 min)

You don’t wait until launch to get attention.
You start showing up now.
You turn your niche and idea into content - daily - automatically.

You’re not becoming a creator.
You’re becoming visible to the people your product is for.

Action - Automate your audience system

Now that you’ve picked a product and a niche, you’re ready to grow in public.

MarketingBlocks AI will post 100+ expert-style content pieces every week.

Do this now:

1. Go to MarketingBlocks.ai

2. Create your free account

3. Choose: “Expert Growth Agent”

4. Enter:

   • Your product’s niche (e.g. productivity, freelancers)

   • Your user (e.g. students)

   • What your product helps them do

   • Topics you want to grow in (e.g. time tracking, habits)
     

5. Turn on “Autopilot Mode” (or “Copilot” if you want more control)

This trains your AI agent to post content aligned with your product.
Now, while you sleep… your content engine runs.

You’ll wake up with niche-relevant expert content going out automatically.
You’re building authority while you sleep.

It will publish content daily to your socials.
It will make you visible before your product is even real.

Step 6: Sketch your UI (optional but helpful)

Use paper, Whimsical, or Figma

Sketch these screens:

• Signup/Login

• Dashboard

• Create item

• View list

• Settings/Profile

Label each screen
Use boxes and labels only
No icons, no fonts, no colors

Action:
Spend 10 minutes sketching your screens
Take a photo or screenshot
Keep it open while building tomorrow

Step 7: Generate your Vibe Coding Prompt (10 min)

This is the prompt you’ll give to the AI builder tomorrow to create your app.

You won’t write code.
You’ll describe what the app does, who it’s for, and what features it needs.
The AI will generate the technical and product specification for you.

Why this step matters

Your entire app build will depend on this prompt.

A vague or messy prompt leads to:

• Broken logic

• Missing screens

• Features you didn’t ask for

• Poor user experience
  

A good prompt leads to:

• Clear data structure

• Functional core features

• Mobile-friendly layouts

• Fewer fixes later
  

You don’t need to know product or tech terms.
ChatGPT will write all of that based on your input.

Action - Use this super-prompt in ChatGPT

Paste the prompt below into ChatGPT.
Replace the [brackets] with your app idea.

I want you to write a detailed build prompt for an AI-based vibe coding tool like Base44, Cursor, or Replit AI. I will paste your output into the builder.

Do not generate code. Only generate the structured prompt.

Here is the app:
App name: [Your app name]  
Target user: [Who the app is for]  
Problem: [What this user is stuck on]  
Goal: [What result they want]

Core features:

1. [Feature 1 - include what it does and why it matters]  
2. [Feature 2 - include what it does and why it matters]  
3. [Feature 3 - include what it does and why it matters]

The final build prompt must include:
- Login and signup 
- A dashboard page after login  
- A form to create [main item or data]  
- A list to display saved [items]  
- A way to update or mark each [item] complete  
- A clean, mobile-friendly layout  
- Clear field names, labels, and page structure  
- No branding or design elements

 Paste the full version into ChatGPT. (Attach a sketch if you did it)
Let it return a build-ready prompt.
Copy it to your notes.

Output - What you should get back

ChatGPT will return a fully structured prompt.
It will look like a spec document with:

• Page layout

• Data model

• Inputs and buttons

• Logic for saving and updating

• Plain-language instructions the AI builder can follow

Step 8: Brainstorm the APIs You’ll Need (10 min)

Your app probably won’t live in isolation… most SaaS tools connect to others through APIs. Before building tomorrow, list which third-party services your app might talk to.

What’s an API (in plain English)? It’s like a power outlet your app plugs into so it can do extra things (send emails, take payments, log people in) without you building those from scratch.

Do this in 10 minutes (no coding):

1. Circle what your app needs (now or soon): login • payments • emails/notifications • file uploads • pulling data from another site • simple automations.

2. Pick 1 beginner‑friendly option for each circled item from the table below. Don’t sign up yet. Just decide.

Examples by category:

Ask ChatGPT for help
Paste this:

Then:

• Pick 1–3 APIs to explore on Saturday (don’t sign up yet).

• Add them to your notes or build prompt as “future integrations.”

Why this matters:
By thinking about APIs early, you’ll:

• Choose ideas that are actually buildable.

• Avoid rebuilding basic infrastructure (auth, storage, etc).

• Know what to connect once your MVP works.

Final Checklist Before Sleep

You are ready for Saturday when:

• You wrote 1 sentence about your product

• You mapped your user’s core loop

• You picked exactly 3 features

• You described your user and niche

• You generated and saved your build prompt

• You activated your MarketingBlocks content engine

You now have:

• A real product idea

• A specific audience

• An automation system for growth

• A working prompt for tomorrow’s build

You’ve Got the Plan. Now Let’s Build It.
Proceed to Part 3 → Build Your App with AI