The rockford cdl was the easiest by far for registering a schoolie as an rv.
Technically you need
4 of these in any combo
110 Electricity
Fridge
Toliet
Water Tank
Heater
Cooking Appliance
In actuality, a coleman stove, a 110 inverter, a 12 volt cooler and a space heater count and is all I had in my busses (got one for me and one for mom) to do the RV conversion.