I'm not saying it's reasonable, but I think these people are designing their house for peak capacity, not average. people with these kinds of houses might fly t

I'm not saying it's reasonable, but I think these people are designing their house for peak capacity, not average. people with these kinds of houses might fly their entire extended family out for holidays (or several of their friend's families). they don't necessarily care that the place is empty most of the year; it's probably not their only house anyway. obviously they hire people to maintain the place.