Well, there you go. Cut my suggestion of sports and stick to my first suggestion of facilities.
There are plenty of contractors out there that sell new MEP equipt to schools that have a quick ROI. Before I left my last job, the company was establishing a partnership with a local MEP designer and then offer to design replacement MEP systems, install new equipt, finance the cost over a 10yr period, and the utility savings over first ten yrs would pay for the cost of the work. I have no idea how it worked out since I left, but basically, other than maint, it is like free new stuff for 10 yrs, and afterward huge savings.