Mine has 252k at the moment, and 7000 hrs on the gen. I have no hesitation about doing a loop of the country every year. Have the fluids analyzed on the oil, coolant, and transmission. Have a competent mechanic look it over. Be prepared to replace air bags, air conditioners, and appliances at that age. After all you would not buy a 20 yr old house and not expect to replace appliances and hvac equipment. The drivetrain is the most robust part of the motorhome. Look for signs of water ingress