You do understand that an RV is subject to a lot of movement, jolts, and banging around...that as time goes on electrical connections loosen up, become worn, corroded, wiring covering stiffens, something rubs against something.
Even if it is 100% perfect out the door, various components and parts fail, and that the electrical system is the source of most failures and frustration.
Have you considered building your own so that the unit meets your standards...seriously, there are people who have built their own or completely refurbished an older unit.
Don't mean to light a fire here or insult you, just saying that RVs are well know to suffer lots of problems and are referred to as money pits.
Owning an RV is a luxury, custom item with membership in an exclusive club.