Changing anti freeze belts and hoses every 30K seems excessive to me, I just carry spares and monitor wear as a maintenance item. Today's coolants will go 100K as recommended, it's not your dad's coolant anymore. Jack stands. I have large wooden blocks I drive the coach onto. I don't trust todays jack stands, like the ones from HF to hold up my coach. NEVER use the levelers to hold up the coach and work underneath. When I do change or remove a front tire I use a block of wood for safety.