Open Cart, PHP, website development

Hi, We are a fast growing design studio. We require an online shop to sell our designs. The website will be sleek, modern looking and technically sound. Customers should be able to select the products, upload design briefs (text and pictures) to a folder in our server, live chat with customer support, get a custom quote and pay online before we start designing their jobs. Each customer should be able to create user name and password and can keep track of their payments and order history. The package buyers should get credits to spend on our designs, 1 credit = $1. At the end of each job customers should leave a review and after editing those review will appear on our home page plus a separate feedback page. More details will be provided to the successful bidder. All bidders should have experience of building similar websites and be willing to transfer the source code and rights to us on completion of the job. Please provide links in your bids. Happy bidding. Thanks, Hash