My car shelter is sick

Which cost more ???? a tarp or a repair to a car???.. I personally would build something that will hold up for years to come instead of throwing money away year after year.. How do you replace a car that is vintage and have so much time in restoring...It seems like a no brainer, but I'm not in your shoes and dont know all the circuimstances that may prevent you from building a long lasting structure...Bill