New site idea !! What do you think ?

Alright I was thinking today about make a forum/site for gaming. Before you thinking oh god another wanna be gaming site. Well my site will be different very different. It will be some like sitepoint and now you ask how is that possible.

Well I was thinking hmm alot of people make my by playing CS but their all in a clan or some sort of team and in a tournament of some kind. I wanted the main focus of this site/forum game for money. Let me rephrase that the buy in will be 3 dollars once the 3 dollars is recieve by me or my partner we will post your information on yourself, skills, description of the type of opponent you are looking for. Once that happens that 1 post shall stay up for a month maybe shorter not 100% sure on that.

Once some accepts your challenge they will also have to pay 3 dollars but don't forget they are also playing on a wager. Say the Post wants to play someone for 25$ so who ever looses will ow the other person the $25.

-Also what type of legal things will I be looking at for this type of site/forum.