[Jmueller]

Lots of variables to factor.  How well the coach has been maintained, what's been replaced already, whether you will do any of the work yourself, etc. that will vary coach to coach and owner to owner.  Maintenance costs are part of owning a coach, so yes there will be costs. Id have no idea how much but just shooting from the hip, $30k seems high for a well maintained coach.  However, if not much has been replaced then it's possible... tires, air bags, slide seals, AC's, pumps, compressors, etc can add up fast.  But then if you did replace all that, you wouldn't likely need to replace for years. For us, we spent more in year one then in year two, etc.

I heard from another Newell Guru that mentioned similar items to look for.  He said Appliances are engineered for a 20 year life span, check for water leaks,  check the fluids by having them tested and take it to a DOT truck service station to have the safety items checked, brakes, etc. You brought up the seals and air bags which I forgot to think about. I wonder what the life expectancy of the air bag system is if a coach is parked indoors. I would think 15 years is about it. 
Thank you Jason for taking the time to respond! Really helpful.