Mr.Mahy..., now, after you've told the name, I'm sure, that somewhere I'd read something about this man and his collection.
I think, he started to collect decades ago, when he got the cars for a few Francs and the sellers have loughed about him, what he wants do do with the old scrab.

Isn't one of the buildings, where he stored the cars -the museum itself?- also some special architecture, built in l'Art de Jeunesse or one of the first parking-houses or so?