Mechanic Workshop Management App Development

I need a complete mechanic / two-wheeler workshop management app for a real bike/scooter shop in India (local PC install preferred). What the software must do Customers & vehicles — name, phone, WhatsApp, number plate, make/model Appointments — daily shop capacity (green/yellow/red), book slots Job cards — vehicle entry, status flow (received → work → ready → completed), bay/mechanic Manual labour & parts — enter service name + ₹ per job (no fixed price catalogue required) Extra repairs — draft WhatsApp for customer approval, then add to estimate/bill Estimates & invoices — GST (e.g. 18%), discount, advance payment, balance due Owner bill approval — owner must approve bill before final invoice WhatsApp messages — click-to-chat drafts (received, estimate, ready for pickup, invoice) with correct amount including tax Search — English + spoken Telugu spelling (e.g. kastamar, gaadi, billu) EN / తెలుగు language switch Reports — basic revenue / outstanding Settings — shop name, GST %, capacity, branding/photos optional Offline / local — run on one Windows PC (backend + frontend), simple install Tech preference (flexible if you deliver the same result) Frontend: React (Vite) Backend: Python FastAPI + SQLite Clean UI suitable for a mechanic shop (bright, easy for shop staff) Deliverables Working app installed on my PC Source code Short how-to (EN + simple steps) 15–30 days bug-fix support after delivery Budget ₹15,000 – ₹20,000 fixed price preferred (milestone-based). Important Amounts on Jobs list and WhatsApp must show total with tax Capacity must count vehicles already in the shop, not only appointments Must be usable by shop staff with low computer knowledge Please include in your bid: Similar shop / billing apps you built Delivery time Whether you can do install + training on Windows Suggested Freelancer settings