u/Beginning-Tone-8876

I really need your advice & will appreciate your guidance.
Hi everyone, looking for some pricing reality-checks for the Indian market.

I’ve spent the last few months architecting and building a custom B2B application for a coworking space. I am a solo dev and heavily utilized AI IDE agents to accelerate the build.

The client wants to buy the IP, deploy to production, and put me on a monthly retainer.

Tech Stack: React Native (Expo), React.js Admin Web, Node.js/Express backend, Drizzle ORM, Neon Postgres.

Scope of Work Delivered:

1. Mobile App (iOS/Android): Guest booking flow, OTP authentication.
2. Corporate B2B Engine: A custom digital wallet. Companies buy "Credits" which are auto-allocated to their employees on the 1st of every month.
3. Complex Logic: Hybrid checkouts (Credits + Fiat via PayU integration with hash verification and GST math) and strict race-condition prevention for room inventory.
4. Admin Dashboard: Approval queues, credit ledger adjustments, booking management.

I am handling the end-to-end deployment (Railway, Vercel, App Stores).

Given this is a fully functional, production-ready system replacing expensive SaaS subscriptions (like Nexudus), what is a fair:

1. One-time development/IP handover fee?
2. Monthly server maintenance/support retainer?