Billionaires are setting up multi-million buck properties on mega-ranches. Sales agent Robb Nelson says or not it’s a real estate “Bonanza.” Extinct Fresh York Metropolis Mayor Michael Bloomberg paid $46 million for a 4,600-acre ranch in Colorado. A 41,000-acre ranch in South Dakota goes for $37 million. It entails 5 bedrooms, a fully equipped gymnasium and a condo theater. The ranch will seemingly be a cash maker with plants, over 2,000 cattle and thousands of wild mustangs.