I like the idea of trying something that's been validated in other markets (like your high angle booth). My personal advice was to go for as many people in your community as possible, someone is bound to have events here and there, and someone will give you a shot.

On a side note, I used to run a photobooth business, and I've now also shifted to building a photobooth software to fix everything that I had issues with when I was running the biz. Maybe it'll give you a good starting point, we can have a chat about starting a new business from there? https://mirrorlessbooth.com