If I had it to do all over again, I would have bought up a bunch of downtown parking lots.
I'm not talking about the garages, but the open-air lots -- like the ones near the baseball stadium that are charging sixty dollars a spot for the home opener today. That's almost pure profit, considering that (aside from the mortgage) the only expenses are painting the lines once a year and hiring a couple of people to wave an orange flag to attract cars, collect cash, and make sure nobody is keying the customers' vehicles.
Even if your employees steal 10% of that cash, and you're only charging $5/day when there's no game in town, you've gotta come out way ahead over the course of the year. Not only that, but the value of the land is only going to increase over time.
How is this not the best (legal) business in the world?