Henry Clay Frick House is a 45,000 sqft mansion on 1.26 acres of land in Manhattan (https://en.wikipedia.org/wiki/Henry_Clay_Frick_House). I was wondering if it would still be possible for a rich person to own this type of property because in London there are hundreds of mega mansions like this and some of them are not owned by multi billionaires. London tax rates are significantly lower than New York City’s (I have no idea why cause UK is one of the countries tax their citizens the most)