I have 16 years experience as a programmer. I have been a web developer for 8 years. I have developed systems for back and front office operations since 1998. I have been using telerik controls and reports since 2008. I have served industries utilizing from standalone, to client-server and up to the latest browser based systems.
This is an easy job to do. I can complete this job within 2 days. I have already developed and used this approach many times. I will even use a one-way encryption model. This means, not even me, the developer will be able to decrypt the encrypted data that was encrypted by the DLL.
I have already provided solutions for inventory, sales, purchases, human resource, payroll, ROPOA (Real and Other Properties Owned and Acquired) Systems, fixed assets management, loans management, hotel management, vehicle management and even courier systems. It has served banks, retail outlets, distributors, manufacturers, restaurants, hotels, security agencies, car rentals, electric and water utility companies and farms.
In all these solutions I have mentioned, I have used the same approach to all of them.
We may need to discuss further for I will have questions.