Mr. <PERSON> uses this room for his model trains. If they were to put the house on the market now, it would likely be worth around $5 million, according to real estate agent <PERSON> of <PERSON>. But Ms. <PERSON> said she never wants to leave--they're renovating the property's carriage house so she and her husband can move there when they get older, giving the main house to one of their children.