Build a SaaS ERP + POS project

We would like to build SaaS ERP system it needs to include inventory, customers, vendors, POS, sales, reports, employees INVENTORY - multi location,simple product, matrix product,bundle, assemble PO, category,barcode printing, receiving,inventory transfer,physical inventory CUSTOMERS - registered by location, contact info, sale history, special order history VENDORS - PO history, special order history, PO status POS module needs to be on its own as some users will have access only to this module. offline mode would be plus SALES - invoice, sales order, quote, payments REPORTS - sales, COGS, inventory, PO, Z report, inventory transfers, commission, login activity EMPLOYEES - contact info,access restrictions Also here are some important features : gift cards, promotions,timeclock entries , registers, user permission access must be detailed not only to restrict access to each module but also in the module functions SaaS - billing by number of registers and locations also need some trial version - back end access to user data for support - user access permission - different levels also please let me know what framework will you be using. This is just a simple overview and not all functions are included. if you have any already working systems send me a link. Please if you don't have any experience with ERP or POS systems don't bid! In your bid please include on first line "erpbeba" so I will know that you have read this description.