The good news is that if the company fails, then you, the angels and venture capitalists, share the loss, and no one expects you to pay them back for the funds that were invested. Additionally, all of the interest you pay on the rental property loan is tax deductible, as are other costs like depreciation, repairs or advertising your rental. Therefore, buying on margin is not a good idea for a multi-year investment. Latest on Entrepreneur. However, every blessing comes with a curse.