I have a friend down in Alabama, he and his father have warehouses full of military vehicles, trucks, armor, quite an assortment. Clean, beautiful and crappy.
They lease to the movie industry. When they get a request, if they do not currently have what is needed they search the world to get it, they prep and maintain it during the movie production.
When done the vehicles go into storage.
When a call comes in that they can fulfill from inventory, profits are high, very high.
He sites films from the Bond series to obscure productions.