massive palatial homes with 22 bedrooms and 27 bathrooms.
I worked as a draftsman during the McMansion heyday before the 2008 collapse, and even then, custom homes of the nouveau riche weren't that absurdly large. The only point I can see for such a large home is hosting a lot of guests, or well-appointed quarters for the small army of staff necessary to keep it clean and keep things running.
I had friends who took to tennis like a duck takes to water, but it was never the sport for me.