We owned an RV rental business for several years. It's a business, not a good way to make passive income on your personal rig. If you want to open an RV rental company, do that, with units you aren't personally or financially invested in but keep your personal RV out of it. If you can't afford your RV to the point you need to supplement it's ownership, sell it. You'll be better off. You've heard from 2 people who owned an RV rental business who say don't do it. People do not care about rentals and it will get trashed.
As another poster mentioned you will need insurance. At the time MBA was the only commercial RV rental insurance company. Carrying $1MM in liability insurance is not cheap. Then there is contracts, bookings, detail/cleaning expense (every time) detailed walkthroughs (as required by the insurance), repairs (there will be plenty), accelerated maintenance, the late night phone calls when the TV doesn't work, breakdown coverage, etc etc.
It's a business.