8 Tires will run about $5800.00 mounted and balanced. Air Bags about $4000.00 plus or minus with labor., Norgren valves; there are different types; maybe $3000.00 with labor. Shocks $ 1000.00-1500.00 with labor.
Seals, bushings, etc. can run up a couple of thousand more.
Change out coolant, Oils, filters, and lube. $2000.00
These are off the top of my head so , each coach will have their own issues and costs.