That's a very misleading photo. An aerial view shows the multiple large buildings much better. https://presidenthouse.org/entry-18

That's a much better set of photos. It also confirms he was content with a two-car garage.

It also stands in contrast to the other celebrities and business leaders featured on that site. If they had a ranking ordered by size/value ascending, I wonder what number he would be. I still suspect it'd be near the top.