If you have a gentle hand and can share information with the people at dmv to change the title to motorhome, then it's a whole different ball game.
Seats out, a bedding and sleep area, potable water, separate power source, separate heat source, etc. I took pictures and shared 'em with the worker there and shared the information that i had NOT modified the engine or chassis (which requires an officer to inspect and issue a new vin) and that i had satisfied the requirements for a motorhome.
And i kept patient and kind, and my fingers crossed. I was informative and NOT demanding, i asked politely if i may share some information a few times when they said "you can't do that." after some time they were as happy as me to figure out that it is as simple as changing the name from bus to motorhome when they issue the new title into my name.
Good luck either way!