I've been kicking around the idea of getting a 7x16 enclosed trailer and sticking a full bath in the front sort of like a home made toy hauler. Few holding tanks, hotwater heater some fold down beds on the sides and a roof AC and your done. I've been keeping an eye out for a good used trailer. I figured it would be sort of dual purpose.. Small enough for short trips but be a large step up from a tent on camping trips. The bathroom would only take up the first 4 foot, So I'd still have a 12' Cargo trailer when needed.