The most expensive home sale in Palm Beach, Florida, closed last week for $152 million, and the developer who sold it says it's part of his efforts to create a new luxury asset class. The 28,618-square-foot mansion on a 2.3-acre private island has 11 bedrooms and 15 bathrooms. It first hit the market in 2022 with an asking price of $218 million. The property at 10 Tarpon Isle was renovated and expanded by spec developer Todd Glaser and his partners, who paid $85 million for the estate in 2021. I