Quality has nothing to do with price. A Prevost should have the same quality and reliability as any other motorhome.
The same with cars. A Mercedes may be a luxury car but there are many inexpensive cars that will last just as long albeit not as comfortable or luxurious. They won't leak, they won't break down. It's industry quality, not price quality.
I have a VW (Pointer GT) product that cost me $9800 new, entry level vehicle. A pleasure to drive with 100,000 miles on it, no leaks, no breakdowns. It's not about money.