The Biltmore Mansion Estate is worth about 2.5-3.0 billion dollars today. Built at a cost of $5 million dollars between 1890 and 1895, and another $4 million to furnish it. This includes 4 acre footprint home, landscaping, and a total 128,000 acres of land. To do this today (2009 dollars), it would cost you $230 million dollars.