This story first appeared about 10 years ago. It has many variants from "Guy buys abandoned building" to "Photographer out for a walk" peaks into window.
If you think about it logically there are no "Barn Finds" especially one where someone buys 180 cars and puts them into a building and then forgets about them. Someone had to know those cars are in there. In this case the owner hired someone to take pictures of his cars and those pictures were leaked and the stories began.
If you run across the "Photographer out for a walk peaks in window", look at the first picture. The windows are 10' (or more) up the wall. So unless he was out taking his ladder for a walk it didn't happen either.
