Most important after tires and batteries is the condition of the roof sealant where the one-piece filon roof tucks into the side drip rails on the entire length of both sides of all 37+ feet.
This is a well known maintenance item that is almost always overlooked. Once this sealant fails there is very little holding down the thin sheet of fiberglass reinforced plastic that is your roof.
You may think, “So what” but there are thousands of documented cases of whole sections of the roof blowing off as people drive down the road.
Don’t put off checking this. It won’t kill you liked out of date tires, or strand you like spent batteries but it will cost you tens of thousands of dollars to rebuild your roof.