The advice here is good- particularly buying lightly used— affirmed mileage/odometer.
Don’t be fooled by the wonderful interior photos, or ads that do not talk or show the mechanical side of things. The powerplant (as stated elsewhere.. gas vs. diesel— diesel is the long haul system, for example.) is important consideration, and thus mileage becomes important and maintenance records of the prior owner.
Have more than a few friends who are pro road entertainers/musicians- and they warn about this in reference to conversion busses- which they now lease instead of own. Professionally speaking volumes. They have pro drivers—trucker pros, insured (non-drinkers, and non-diabetics, etc.) This would be of consideration if you are thinking of getting a used Prevost vs. other ‘brands’ like MCI or other. These are busses— not what bus owners call “plastic busses” with slide outs that are truly de-stabilizing in the structure (walls are not continuous with slide outs).
Here’s an ad for one in CA- which has (if true) low mileage for a 1999 Prevost Diesel—167,000 miles. And it is a bus.. a real one. :https://www.poprvs.com/conversion-buses-for-sale/prevost-45-in-oakdale-california-154954
For a view of what that means— you could check out Neil Boortz (@talkmaster) who has a top end (read: hexpensive- in the neighborhood of 500K or more). Prevost is the President’s rig (obamaumao bought two— money no object- armored etc. Secret Service drivers... camping out... NOT!)
Besides these comments— if you want economy and less hassle- it is far easier to drive a Conversion van- and one that has what are called “Dually” rear wheels (that is, rear wheel drive and there are paired wheels (2 on the R, 2 on the Left) for ... stability. The taller models have some sway issues— and high profile in wind. Not to scare you- but it could be an issue in any of our mtns. and esp out West and in AK. They have showers/bath, full beds etc. and you can stay in a motel if you tire of this on the road in campsites or Walmart parking lots (many of these are zoos)
Finally- imho- one has to have some mechanical ability to keep up with an RV-. electrical, plumbing, gas/diesel generator operation/maintenance. And for driving— it is not a sportscar to drive a 35 or 45 foot pusher diesel on an interstate (or a mtn. two-lane for that matter). As someone said it can be white knuckle— stopping emergently for example. Again, not to scare off— in opinion- if you can do this, then it will be a vacation- otherwise it might be road repair “out there”. There is a wealth of info out there- and FReepers here have given great wide advice. Fulltimer RV living is seriously different— but many just love it!
I own a cheap truck and rent cabin, but camping is a hoot!
My reply #89 was not sent to you— hopefully you’re reading the thread. And later reply had a link to an ad that had photos without requiring a “membership” to see them. An email you don’t care about and then later trash or change is a good idea you will be pestered by some hurried sellers. RVs not quite as bad as a boat (hole in the water where you pour your money, etc).