Most people decide to open a gym, then go okay were is the location going to be, and where can i get the equipment. Then buy everything, location and equipment. They start to get members but because no gym can grow fast enough, so the close very quick. This is because they owe so much money on the equipment, equipment is the most expensive part of owning a gym. You would want to plan about 2 years in advance, start buy used equipment out of the paper, and when other gyms close down. Then after you have all this equipment saved up, open your gym. Now all you have to pay is your lease, and utils. If you want your gym to have showers or anything extra like that, it will cost more because then you need to purchase insurance.