why re-title as a motorhome? I never did. I'm not sure what the advantages are. My annual registration costs me under $40 bucks.
GMAC insurance gave me no problem whatsoever insuring the bus. Their classification is "BUSC". It's more expensive than i think it should be, but it was easy to get. Cost me about 6 or 8 hundred per year. I can't remember right off hand, since i insure all three of my vehicles through GMAC. Michigan is an expensive insurance state.
As a non commercial vehicle you're not required to have a CDL. Some states may require an air brake endorsement. As i understand the law, if you have a bus registered in a state like michigan which does NOT require an air brake endorsement and you're traveling in a state that DOES require the endorsement, like California, you're still legal.
Quis custodiet ipsos custodes (who will watch the watchmen?)