For future searches, I just wanted to add this. It's the definition of a "house car", or motor home as legally defined in the state of North Carolina. The laws in your state are most likely completely different, so don't go by this in other states. I copied this directly out of the NC Chapter 20 statutes that govern motor vehicles."Motor home or house car. – A vehicular unit, designed to provide temporary living quarters, built into as an integral part, or permanently attached to, a self-propelled motor vehicle chassis or van. The vehicle must provide at least four of the following facilities: cooking, refrigeration or icebox, self-contained toilet, heating or air conditioning, a portable water supply system including a faucet and sink, separate 110-125 volt electrical power supply, or an LP gas supply."After I had the required systems installed, I scheduled an appointment with a DMV inspector who came out to my house and changed the designation from "bus" to "house car" while on his computer in my driveway. (He was fascinated with the project, btw.) I never again used the B-word, and have had zero problems with getting insurance, registration, the authorities, etc. It's not a bus - it's a motor home. Period.
Don't disagree with what you said. My main point with regard to insurance is that just because a vehicle is tagged as a motor home doesn't mean the insurance company will agree. Push come to shove, if/when there is a claim on the policy they will look for any reason to deny the claim.