Generator Wanted

I am looking for a small gas generator to power a fifth wheel trailer. Can't afford much but can pay some. It's for my friend, a senior who is living in an unheated trailer that has no electricty or running water, and I am afraid he's going to freeze to death when it gets colder. If you can give me a good deal I'd like to help him out and make sure he is safe. Please contact me. Thanks!