If you want a full sport betting site pm me and I can point you in the right direction, but you will be looking at spending at least $250,000 and they will require at least that as a marketing budget on top, even then your pushing shit up hill imho. These things need big funding to kick off, lots of organization, data feeds and team of support.
Other wise just join as an affliate and collect your 30%
http://www.vipprofits.com/