milage: 22,000 just replaced all batterys when last 2 yrs ,   including alt. interior water pump, new step motor, new front drapes,tires 4 years ago, r&r generator carb with tuneup, awning 3 yrs ago, sealed roof last year, new bath skylight, winguard playmaker dish, ft and rear flat screen t.v.'s, misc other things we spent 5,000. 2 yrs ago on lots of these items. the engine is a ford v-10 trition.  we've this coach several years.