I've always heard and believe it since I had a great Uncle that had an RV for many years, was a member of the Good Sam club and all of that, but the best 2 days of owning an RV is the day you get it, and they day you get rid of it.
The cost of the RV, the fuel cost or an RV and the cost of the maintenance, it's been proven that traveling in a NON RV vehicle and staying in hotels is much cheaper in the long run. I know, that takes the fun away. I do know a family that does this, and they do have camping gear too as far as tents and such, so they mix it up a bit and do motels and camping without the expense of an RV.
An older retired couple that were my neighbors for years, had a Class A coach for years. They sold it and bought a 5th wheel and crew cab dually pick up to tow it with and said it was much cheaper to go that route. When they traveled, they parked the 5th wheel and set it up, then had the truck to go away from the campsite, like down to the river or to the casinos' They seemed to have liked the 5th wheel idea much better. Of course it was a fairly nice trailer with a couple of slide outs and was quite roomy once they got where they were going and set it up. Downside to that, if you're going boating, then you can't tow your boat.