I've been pondering the same thing - I have AN's too, lovely goats, excellent milkers and really creamy too! I only have one milking nanny and I don't take a lot from her, the kid has one side I have the other!
I am thinking about getting more goats now, plus I have three females that could potentially kid next year so what am I going to do with all these goats and the milk?
I could sell the offspring I suppose, might be easier to part with next year's babies, couldn't face it this year.
Milk wise there would be too much for me alone to use, I could make cheese and ice cream too but I don't think it's esp healthy having that much dairy produce in my diet.
But equally I wouldn't have enough to supply commercially, a shop would probably want more than I can produce. Might work for bartering except there's not much I need...
I haven't investigated the rules and regs for selling dairy products at all yet, I expect it may be prohibitive on a small scale; so it's either stick to a number I can manage with or buy a hundred more goats and start producing big time!