New to forum, and info questions.

Tires must be taken seriously on an RV.If tires are older than five years old inspect for sidewall cracks and replace them if suspect. If a rear tire comes apart, it can thrash the holding tanks, propane lines and wiring as well as disrupt your trip.A blowout in a front tire can cause loss of control. If you ever have a tire fail DO NOT use the brakes. It is a good idea to have the flexible front brake lines replaced. They can rupture internally causing sudden pull to right or left. While your at it, have the entire brake system checked and fluid flushed and replaced. The cooling system on an older rig may need overhaul. If it wants to overheat going up a grade, have cooling system checked. These things are critical to for safe driving and not being stranded and paying through the nose away from home. Other stuff can usually wait. Above is based on personal experience with an old rig. Good Luck is partly due to good maintenance.