You've probably got enough money and enough of an analytical mindset to explore the cost-per-lead affiliate marketing space, figure out what works through test buys (like poker, you've got to play a lot before you get good at it), and then have enough cash left over to float your operation while spending at a decent scale.
Downside - this can be an ethically-challenged business. But so are most 'make money fast' schemes.
Downside - this can be an ethically-challenged business. But so are most 'make money fast' schemes.