Should I buy a hybrid RV/boat or just tow a boat

Good god people, he just wants to know if he can use a boat as a camper. Not a houseboat, but something that's camper size and has the amenities to camp in. I've thought about this myself at one time or another since I'm probably not going to own both at the present time. I've seen people camping in pretty much anything large enough for a sleeping bag, so why is a boat such a confusing concept?