When I was stationed in Naples, Italy, our landlord had a milk goat. Very nice goat. One day the goat was gone so I asked our landlord what happened to the goat. Turns out the goat got out of the fenced in area and climbed up on his new car, scratching it all up! That was the end of the goat.
I don't blame him. If the goat had scratched up the cars of those living there, he would have been in real trouble paying for damages.
If I ever get a goat, I don't think it would be for milk. Dear Wife cannot drink cow's milk, but maybe goat's milk is different? Still, she has no desire to drink any milk. And, frankly, I don't drink much milk either so I don't want to have to milk a goat daily. Although, I think Brie cheese comes from goats, and we like that.