The best advise for you to visit a consultant to help you. Do remember where you take license should be a bitcoin friendly country. Plus figure out all the taxes as this is one complicated procedure you better get pros involved to help you out. I mean, calculate all pluses and minuses then create website!
For me, opening such kind of business isnt very helpful. Even I dont have any interest in such businesses because I cant earn by harming others. Profits and losses are integral part of game and it happens in different respectable earning sources as well. But no one harm other person in such drastic way where he isnt able to do anything else. So dont chose such sort of fluffy businesses.