1. Can you provide more details about your current system. Is it an intranet or hosted on a webserver, which we can have a view ?
2. The total system with the features you have listed out can be developed in the php/mysql or in php/postgresql
3. The system will contain the following modules
a. User Module ( Users, Admin managements and their functionality)
b. Product module ( Product, Category management)
c. Search Module ( Various search options based on product, sales, etc,)
d. Sales module ( invoice, accounting )
e. Purchase module( Purchase Request, Purchase Order, accounting etc)
f. Finance module ( banking, payments, accounts)
g. Accounts module ( journal entries, chart, account group, etc)
h. Report module
i. Config and settings module
4. An overview of your full system and their related functionality ( detailed mapping of the systems) will be required.
Approximate time to complete the project : 75 - 90 days.
Thanks & Best Regards,
Gopal
Note: If you shortlisted then I will be back with more details