Billionaires are increasing multi-million dollar properties on mega-ranches. Sales agent Robb Nelson says it is miles an real estate “Bonanza.” Weak Novel York Metropolis Mayor Michael Bloomberg paid $46 million for a 4,600-acre ranch in Colorado. A 41,000-acre ranch in South Dakota is going for $37 million. It comprises 5 bedrooms, a fully outfitted gymnasium and a rental theater. The ranch is furthermore a money maker with plant life, over 2,000 cattle and hundreds of untamed mustangs.