Hi,
We have gone through your project details and we have perceived that we can do this best, as we have prior experiences on similar projects. Please check the PM. I am looking forward to your response and believe that you will go with the best.
Thanks.
Sir
I can setup an online shop for your work using oscommerce or corncart open source solution. Both have multiple payment module integration and admin control panel to manage users and products.
Regards.