add some trampolines too, that would be sick. depending on the location the business could be really profitable, but facilities are just the beginning of the cost. what you gotta worry about is zoning laws, taxes, and you better have a good lawyer so you're prepared for any lawsuits after opening. also make sure people sign waivers or some other legal contract before using the park, but that's pretty much a given. you should also do some market research before you decide to build anything, or you may be in for a loss of a whole lot of money. get to know any potential competitors and see if people in the area would actually use the facility. also you should get a rough estimate for monthly operating costs, which can quickly pile up. Water, Electricity, Internet, Phone, Worker wages, INSURANCE, etc.
That last one can be problematic for places like these, but if you're willing to shell out the money and see it as a good investment, go for it. good luck.
watch your profanity