Space is a factor too. I toured the mansion one time a few years back because a friend of mine was remodeling it. The master bedroom was as large as my entire house. That's a single bedroom for the two people planned to live there. I saw it while it was still under construction and so completely unlivable and but you could quickly figure out which parts were intended for the people lived there to live in and which parts were semi-public most of the mansion was clearly public spaces where they would have parties.