Thats a business to have buddy, makes money for you without a lot of involvement. I own 8 gyms and I also have a sports/fitness equipment manufacturing company. We made "bubble soccer" suits few months ago, low investment because its straight from my manufacturer. Rents for a shit ton per hour.
Look into "bubble soccer" also, you can rent them like crazy. Plus the return customers like bounce houses because its primarily for birthdays. Same style as what you do now, and the ROI in insane 300% return easy, PER MONTH.