I am currently knee deep in my accounting major. I think you should consider accounting. I am not positive, but I believe that if you owned a gym, you could legally depreciate the gym equipment. You might end up operating at a paper loss, but have positive cash flow TAX FREE. A gym is pretty much a cash cow...there is a constant flow of cash coming in on monthly membership fees. I would have to get down with the actual numbers to see how it would work out, but it seems to me like it could be a promising business. Something else to consider: buying the property instead of renting it. When dealing with commercial propery, the building can be depreciated and the amortization on the mortgage is a legit business expense.