Brew the beer, chill it and put it in a fermenter. Sell it, to whoever, with a pack of yeast. It's up to them ( with your help at their house, if needed) from then on. You've done nothing but sell an nonalcoholic malt beverage. I don't think that's illegal anywhere.
Just wanted to say hi. Been brewing, AG, for several years and watching this and other sites for a while. Probably won't be posting a lot, because you guys seem to be doing okay without my advice. I like good beer. If it meets a particular style, then tell me so I can brag about it, otherwise just drink it and enjoy.