It’s best to lease out your house, especially if you’re going to be gone for long periods of time, otherwise you may return to find squatters in your home. A lot of homes that were abandoned became places where homeless people camped out, and even if you have a burglar alarm system on your house, as I do, when people know you’re gone for a long time they can find their way around that alarm system and your house may become a target for thief. Having someone live in your home can be a deterrent, as a lived in house is probably not as often targeted as a vacant house.