If you don't mind a rusted out car, you can certainly keep them running for a long time. However, you want a nice car? Well, that's a different story. An assembly line is so much more efficient than manual labor that a brand new car is cheaper than rebuilding an old car. When you talk to car collectors you discover that either they have done a huge amount of labor themselves and they have no clue how much that would cost if they would pay someone or yeah they're paying someone and you discover that they they are paying more than new cars to keep this show only car in a perfect condition.
