Is it legal to self finance an income property?

How would that work exactly if you own the property (which you would have to have paid the seller in full to do).

Sounds illegal... trying to claim a deduction when there really isn't one without fancy legal maneuvers like if the income property is held by a corporation you own and you provide financing from personal assets outside the corporation.

Which you would REALLY want a lawyer to examine and clear before trying or you could find yourself in a lot of hot water with the IRS. ( I have no idea if that's even Legal)

Maybe if you told us exactly what you are considering we might be able to better help you. Post is unclear.

How do you loan yourself money? Has to be a tax evasion scam and would therefore be illegal