You can pay the amount when you are satisfied. I will send you the first version of the project and send me you comments. Once you have all your comment fulfilled you can pay me.
Hello, I'm a student with lots of programming experience and lots of free time, I'll develop this product for you. I can develop this for you for the least amount possible. You can pay me only when you are satisfied with the product.
We will doing all that you want (and more... :-))). Quickly, Professional, Quality - our answer you and your organization. We work more than 5 years.. There are questions?