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.