Do you know how much work that is? Not only that, but enjoy consistent lawsuits against you for distributing copyrighted material. It's an easy case to win, if you set your site up right, but I highly doubt anyone wants to deal with that.
I know a few people making some nice money from things they set up online, but it's all a niche market. The only "real" way to make a big buck online nowadays is to come up with a completely new idea since nearly everything thought up already is saturated.
Maybe you could make a RuneScape fan site? Everyone's gotta start somewhere, mine as well build something where you know you could attract users to easily and make your mistakes with something less risky. You don't want your first business venture with massive amounts of capital involved to be your first attempt in the online market.