

Yes, more or less everything involves money. This is like when someone says “ugh, X isn’t political”, and then someone else points out that no, everything is political. If you want something that can’t just be picked up off the ground, then someone, somewhere is paying for it, in some way.
As noted before, this will probably present a far larger barrier to most people than a small fee. You can already host an event like this in any given public park with no permit necessary. However, most people have a spare $5 but are highly reluctant to embarrass themselves in the town square - so charging a fee for privacy is more inclusive.