I am of the same opinion.

Just doing the napkin math on it, it doesn't come out to be a crazy number, and the bang per buck (in terms of how much it benefits the students) was great.

Another similar event that my school did was reserving GA Aquarium for students for an evening+overnight. That one was even better imo, as I love GA Aquarium a ton. And being allowed to stay overnight to sleep in your own sleeping bag right next to sharks and other animals passing you by was soothing and awesome.