Cloud-Based ERP System Development Bussiness management software from scratch

I need an experienced developer/team to build a cloud-based ERP/business management system from scratch, inspired by modern Indian ERP functionality (original code/UI, NOT a copy).

Core modules:
• POS/GST billing & professional invoices
• Sales, purchase, returns & quotations
• Inventory, barcode, warehouse & stock transfer
• Customers, suppliers, payments & outstanding
• Accounting, expenses, P&L, balance sheet & reports
• Multi-business, multi-shop/branch & role permissions
• Admin panel & subscription management
• PDF/Excel/CSV export
• WhatsApp invoice sharing
• Cloud backup, security & audit logs
• Responsive web application

IMPORTANT FEATURE: AI/OCR invoice scanner — upload/take photo of purchase invoice → automatically extract supplier, invoice no/date, products, HSN, quantity, rate, GST and totals → editable verification → confirm purchase → update inventory.

Need scalable SaaS architecture with separate data for each business.

Please quote separately for MVP and complete version, including timeline, technology, hosting/API/OCR recurring costs, maintenance and source-code ownership.

Only experienced ERP developers. Please provide previous ERP demo/portfolio.