Community Tennis Website

In Canada, public tennis courts are free open. People of all level come and play and leave... We play with people but we easily loose contact when they stop to play. Now, I want to build a web site, so we can have a platform for people to communicate and we can discuss, share and track all the time. Requirements are: 1. Registrer page. People have to register to become a member of the site. Members need to log in for certain member's functions. 2. Member can upload pictures and videos. Anyone can view pictures and videos. 3. Forum to discuss some topic, like US Open or how to serve and so on. Only member can write. 4. Member profile page for each member. Only members can view after login. 5. Buy and sell page. Members can post used racquets, bags, balls to sell, anyone can buy. This nees a shopping cart which support paypal. 6. Event page. It displays all the tennis or sports events for international or local. Since this is a community service, we plan to find a tennis player who has computer background to mainain this web site later. So we require a source code and how-to instruction of how to maintain this web site, including source code, design document or IDE used. We prefer PHP/MySQL and ASP.NET/MySQL. 5.