Inspect tires for sidewall cracks and any bulges. RV tires can become unsafe after 5-7 years from just sitting parked. Service entire brake system including flushing of old brake fluid and replacement of front flexible brake lines. Service engine cooling system including fan clutch radiator, water pump and all belts and hoses. Service roof AC, dash AC, furnace, fresh water pump, awning, and plumbing. Replace house batteries, converter/charger and associated relays and switches as needed for reliable 12 volt DC power. Check entire exterior lighting system. Re-seal roof vents, replace vent covers. Replace/repair window blinds. Test and service RV generator, should be able to run roof AC and microwave simultaneously. Replace awning fabric if needed. Try not to spend so much on old rig that you feel "stuck with it".
