Sullivan,
Don't feel bad about the 15years and only 50K. Our coach is 43 and only 165K.
Things to watch out for (we know about older). Flush the cooling system as the corrosion inhibitors have been depleted. Flush the Brakes because the fluid collects water and that corrodes important parts. While tires seem to start failing at 7~8 years, you can expect the other rubber parts to start going bad about now. So, as time and money permit, start inspecting at least and replacing some rubber just on principle. Start will the fuel and brake lines, but do not forget the coolant lines. Suspect everything rubber.
Matt
