How I Built a Revenue-Ready SaaS App in 90 Days (Zonely Case Study)
Real estate founders were wasting $50K+ on agencies and waiting 6 months for buggy MVPs. Here's how I built Zonely - a full real estate intelligence SaaS platform - in just 90 days.
🏢 The Problem
Real estate investors were hemorrhaging money on slow, buggy development. Here's what they were facing:
- ❌Agencies charging $50K-$100K for basic MVPs
- ❌6-12 month development timelines (deals getting cold)
- ❌Buggy apps that crash on live demos
- ❌No revenue features (can't charge users!)
- ❌Agencies disappearing mid-project
⚡ What I Built
Zonely is a complete real estate intelligence platform with AI-powered deal analysis. Here's what I shipped in 90 days:
iOS App (React Native)
- Deal calculator & ROI analysis
- Property search & filtering
- AI-powered market insights
Web Portal (Next.js)
- Admin dashboard
- Analytics & reporting
- User management
Revenue Features
- Stripe subscription billing
- 3 pricing tiers
- Trial period management
AI & Backend
- OpenAI GPT-4 integration
- Firebase Firestore database
- Cloud Functions API
📅 The 90-Day Process
Days 1-14: Foundation
- ✅ Project architecture & tech stack decision
- ✅ Firebase setup (Auth, Firestore, Storage)
- ✅ React Native app skeleton
- ✅ Next.js web portal setup
- ✅ Basic UI components library
Days 15-45: Core Features
- ✅ User authentication (email, Google, Apple Sign-In)
- ✅ Deal calculator with ROI formulas
- ✅ Property data model & CRUD operations
- ✅ AI market analysis integration
- ✅ Admin dashboard basics
Days 46-75: Revenue & Polish
- ✅ Stripe subscription integration
- ✅ Subscription management (upgrade/downgrade/cancel)
- ✅ Analytics tracking (user behavior, feature usage)
- ✅ Advanced search & filtering
- ✅ UI/UX refinements
Days 76-90: Launch Prep
- ✅ App Store submission (iOS)
- ✅ Production deployment (Vercel + Firebase)
- ✅ Performance optimization
- ✅ Bug fixes from beta testing
- ✅ Documentation & handoff
💰 The Outcome
Now acquiring users with a multi-platform ecosystem that competitors took 12+ months to build.
🛠️ Tech Stack
Frontend:
- • React Native (iOS app)
- • Next.js 14 (Web portal)
- • TypeScript
- • Tailwind CSS
Backend:
- • Firebase (Auth, Firestore, Storage)
- • Cloud Functions (Node.js)
- • OpenAI GPT-4 API
- • Stripe API
📝 Key Lessons
1. Ship revenue features FIRST
Don't wait to add payments. Stripe integration took 2 days and unlocked immediate monetization.
2. AI accelerates development
OpenAI integration gave us a competitive edge without months of ML training.
3. React Native = 2 platforms, 1 codebase
Shared 80% of code between iOS and future Android app. Massive time saver.
4. Firebase scales perfectly for SaaS
Started free tier, scales automatically as users grow. No DevOps headaches.
Want a Zonely-Level App?
I can build your revenue-ready SaaS platform in 90 days too. Stop wasting time and money on slow agencies.