Not too much to see in the photos.
-- The engine pulleys that aren't used suggest it had Prevost Bus Air at some point.
-- I see what may be a battery charger (yellow box). No inverter. Besides cable restraints and possible need for additional fuses or breakers, it looks better than some others.
-- Propane tanks must be sealed off from all other compartments and well vented to the ground. I don't see adequate ventilation and wonder if the compartment is totally sealed preventing any possibility on gas entering the bays oor living space. A really good idea is to have a gas detector in the coach with an automatic propane shutoff valve. These are commonplace in yachts. There shouldn't be any spark source in the compartment. I think I see something electrical that would likely be a spark source.