They can cost a lot of money and that's one huge deterrent to many people owning one. Nonetheless, would the repairs from car damage from unprotected vehicles be more? Does the garage or carport really protect a vehicle from costly damage? Also, if you live in a colder climate, then would the savings in time amount to a lot of money? Note, you wouldn't have to unfreeze your windshield and if you had a garage, you wouldn't need to warm your engine up. Anyway, it's my opinion that garages and carports save people a lot of money in certain areas. However, though, it might be highly expensive to buy one or buy a house with those things already built in.