You say "it's humble by billionaire standards" - I think it's relatively humble by ~$300k a year standards. The thing I love about this house is that I think it represents just about the maximum real utility one can get from a home.

He had 3 kids, and a 3500 sq ft house is, IMO, an extremely average size for any decently paid professional where I live with a family that size. It basically looks like something that had everything he needed, and anything beyond that that you so often see in rich people houses is just for show and bling.