Key takeaways A high-altitude Colorado estate serves as a nine-bedroom home and the base for an online tropical fish business. Originally built as a family compound, the home has since been reconfigured for hobbies and personal use. The property, powered by a creek, is on the market for $2.69 million. At nearly 10,000 feet in Colorado’s Red Mountain Mining District, a nine-bedroom home operates as a tropical fish business, a private observatory and a self-powered retreat fueled by mountain water.