Here's a suggestion you haven't heard before.  Buy a used rig from a fireman.  Yes a FIREMAN.  They are fanatics about their equipment, and they are all experts in either plumbing, electric, engines, tool & die, or some other mechanical trade.   Really.   These guys are nuts for maintenance and take pride in how perfect their possessions are.  
Go to a local firehouse and just ask if anyone there owns a motorhome, and are they thinking of selling, or do they know someone who's selling?  I bought my first one and by chance it was owned by an asst Chief who was moving up to a really big one.  It was 18 years old and looked, drove and worked like it was 18 months!   Good luck!