New castle construction will cost between $300 and $600 per square foot of living space. Many other factors are involved in the costs such as land, permits, cost to bring ma … terials to a possibly remote location, bringing utilities to the property etc.gain depend on size, type, and services of the gym. You can still make money from a gym with classes, female are more interested, make studios and hire teachers and charge by the head. Normal gyms could be from £50000 to £500000 but you can limit on that on equipment.