Reorganization and New Construction Needed for Joomla Site

I'm constructing a website which allows users to buy and sell action figure collectibles the same way investors trade company stock. The site has already been set up in terms of infrastructure and navigation, but there are some pages which need to be reorganized, while some key functions still need to be incorporated. The ecommerce needs are being addressed through jMarket Pro, however, because this is an encrypted program it is limiting the site's capabilities in other areas that are important to the overall service. We need to incorporate a more simple service like virtumart or a basic Paypal merchant gateway. The following is a brief outline of the tasks needed to be done: -Build a search module that allows for buyers to view available inventory for sale -allow hard data from buy and sell transactions to be accumulated, tracked and displayed to the user in a stock market displayable environment -create a front page panel of social media buttons linked to the appropriate site pages(facebook & twitter buttons already exist on homepage) -link existing messageboard forum to appropriate main menu button - replace jMarket Pro with a more simplistic and flexible payment gateway. -build module to allow users to track collection vlaue based on real time prices-automated updates -allow existing price ticker to update automatically I can provide business requirements which outline step by step how these functions should work. I also can provide back end access to Joomla panel and FTP access. All bids are welcome, but U.S. Based programmers are preferred. Need to work with someone proficient in English who has no intention of outsourcing work. Good communication is a must!