Bus or Motor Home

There are motorhomes which are true bus conversions (Prevost and MCI, mostly) and they are always called a bus. What makes one a bus or a coach is more a state of mind. They are all motorhomes but I believe the term bus originated when the first, used to be a bus, was built.
I would call what you have either a motorhome, RV or coach. However, you can call it absolutely anything you like and you will still be right!!!!!