3dCart development API project

Hello, I am seeking a true 3dCart developer to work on a backend project. I have all API info from 3d. Project: I want to add a function to cart customer data. A check box that will trigger that customer freedom to buy items as singles and ignore the 3dCart Minimum Qty field. Currently you can set the cart to force a customer to buy by case qty or not. My problem is I have customers that I want to purchase by case and some I do not. I can not set this flag on the customer level or at the product level right now. I want a simple added field to the customer profile section that asks: Must buy case? y/n or checkbox. One clicked that customer will be allowed to buy single units overriding all qty limitations. **** PLEASE DO NOT REPLY unless you have done work on the 3dcart platform. **** I have several projects. This is only one. If this goes well, we can work on other projects. Thank You, Tino 212.431.6100 ext 216