Its a great idea!! I looked into this in CA and for us here in CA you can't do it. I wanted to start a business where I would brew the beer and my SWMBO would serve it at weddings and such and we would serve it. People would book us in advance and either brew the beer themselves to be served at the wedding or we would brew it and directly serve it to the clients party guests. ABC and ATTB went round and round w/ us and in the end it was a no go, because of the 3 tier laws that are set up here in CA. I could brew it. I could sell it to the owners of the party If I had a licensed facility and the license to do so, but I couldn't directly serve it to them or the public. Without all my docs that are at the store right now, I think I needed a type 23 to brew it and sell it on the open market. Basically a brewers license. But you can't here in CA serve your beer to the public without going through a 3rd party distributer, unless it is at your licensed facility. Tap room,etc...
Just make sure ATTB is fully aware of what you want to do. They like to say no to just about everything they don't understand. But we have to remember the laws were written during prohibition and everybody that wrote them is dead, as the laws should be!
Good luck
let me know how this turns out. I spent hours on the phone with them. Great people really, but they just don't get it IMHO
Cheers
Jay