I have different answers.
1. CDL type A or B
2. If owner operate the bus no need CDL due to type of recreational bus.
3. According to DMV regulations if the bus have 110 electricity, pluming system and Propane stracture the bus qualify to change the use in the title to recreational bus.
I was in the process to change the use but due to my health condition I was forced to sell and I stop any proceed.