The are the same as RV's easy to insure too they are called and sold as super C's or B's in Rv talk
After selling my 1991 XL Prevost a couple months back, thinking about the Super C's myself. I feel your pain Scott. Seems like the 11 + years we owned ours, take a small trip and work on something, ( not engine related) but imagine that will be on anything we run down the road with.
What I don't like about the super C's is they are hard for older people to get in and out of because of the entrance they set so high
Guess it all depends on how things are situated. I've seen some nice commercially made Super C units with a side door just like any Class A motorhome, complete with a step well and drop down outside steps. Pretty easy to just use the side door and walk into the cab if things are set up correctly.
As I stated in the Super C thread, the floor height on a modern bus (H3, J or E) is higher than the frame rails on any truck.