build me a point of sales system

-i want a system that i can sell back to my customer
-i want that system of point of sales that i can duplicate and license to others
- i want it permanent to my company and license for my alone after finished it
-it software can be function to all retail/trading company
-have a profit and loss system
-it can have inventory system
-have database system include customer/debtor/supplier and so on
-have system generate barcode automatically
-have cloud server include web base with website
-have invoice recepit/ quotation/ and so on
-can read the barcode generate by machine weight kilogram automatically barcode system