Maybe you're already aware of this and have it in motion, but you should setup a business. I don't know what state you're in, nor am I a lawyer, so I can't say what would be best (LLC, S Corp, etc.).
You'll also need liability insurance and potentially other insurance and you should probably check on some things related to operating a business out of your home.
I'm not trying to discourage you, but suppose you're taking someone down into your basement to work on some stuff and they fall down your stairs or something happens with their bow while shooting and they decide to sue you. Even defending a legal case is so expensive it's near impossible for an average person to sustain. In my area, a decent lawyer will run at least $300/hour.
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