Harley's girl, what about a dexter cow in milk instead? They are smallish, provide about 1-2 gallons (depending on the cow) and can be alone. Something to think about???
The milking part is easy enough to learn and once you're doing it and your arm muscles are done hurting for the first couple of weeks, you'll be fast and good at it. So don't let that part of all this be a worry to you.
Goat or cow, make sure you have a stand (goat) or stanchion for a cow. It helps your back a ton and keeps the animal still and gives her a good "usual" place to go for the milking routine.
Also, try and find a place as fly free and quiet as you can when milking. That helps a TON!
You'd need something to clean their teats with and there's many schools of thought on that. You'd also need a stainless steel "something" to milk in to. Also, some jars you can store your milk in and are able to clean. The detergent they sell at hoeggers is great for cleaning out your milking supplies. Doing it by hand saves you cleaning a milking and with only one animal to milk, it wouldn't cause you a lot of pain or misery and actually, milking quietly with just your loving animal is a fun, relaxing time.
If you can't get the cow, try and talk your husband into a small whether. Tell him that one could eat the brush up and weeds.
Shouldn't cost you much money to get a whether and it'd keep your girl quiet and happy.
Also, if you let her eat brush, make sure you take her away from it a few hours before milking times and give her some sweet feed, otherwise you may have 'different' tasting milk each time you milk your goat.
Stacy