I had mine in a seasonal site for its first year. The area was all trees. The roof took a breathing! I was up there almost every weekend cleaning it and removing sticks and branches. After that it was almost exclisively kept in indoor storage for the winters. I clean the roof once or twice a year. And check and reseal he caulking. If it’s never been touched I would be worried more about water and rodent damage. The brakes and bearings may be ok. Bearings will need to be cleaned and repacked at minimum and brakes inspected. Tires will for sure needle to be replaced. Hey may be ok to get you to the closest tire store.
Look look look, and inspect everything closely!
