What fluids to service in used RV?

upper and lower water hoses, anything that would dry rott

I bought a 2007 with 18,000 miles so figured since I got it from the original owner I had some idea on what was or was not done. I dumped the trans fluid and replaced the filter, changed motor oil and filter, changed oil in the generator. It has a special engine air fliter so I washed it and oiled it. Added new front and rear upgraded sway bars. Added Scan-Gage to monitor the various systems. In a few weeks will change out the rear axle fluid and flush the brake fluid. I also had to tighten down the roof a/c unit as it got a bit loose and allowed some rain water to dribble in, might want to check that mounting for tightness. Added new tire valve stems to allow the tire monitor system senders to fit easily on the rear duals. Your going to have a blast with your new to you rig.