Can you expound on your statement of 'systems were tired'? What systems were affected?
Probably the biggest issue would be the basement HVAC unit. I had it out twice for repairs, and it was still having issues. Other than that,it was a whole list of less serious issues, caliper slides on the brakes, dash air issues, check valves in the HWH system, muffler replacement, etc.. All possibly expected wear items, but it adds up. Keep in mind that this was a coach with an excellent history and with $20-25K dumped into it in the two years before we bought it. (new fridge, Turbo, six new Michelins, Awning fabric, inverter, roof resealing, batteries, and other repairs and replacements)