Quotation and order portal

I need a new web portal which will give special access to my distributors who can see the prices of different SKUs. It's an automatic preset quotation which if required can be changed manually. The distributors can punch in the order with the name of the end customer and the portal will generate an auto invoice and add receivable to the ledger. There will be a database also created automatically of customers and their details. Then my emoloyee can punch money received. If I'm doing direct sales then there should be an option to generate a lead, quotation and an invoice if to be sent directly to the customer and the ledger system will remain the same.