Wow, why did that post twice? I did look at it and then clicked to post... hmm? I goofed somewhere.
I would suggest 2 does, for many reasons...
1. Goats are sociable animals and would be lonely and hollering if alone.
2. You do need to worm and use other medications, like de-louser or meds for ticks etc... it is best not to use the milk when the doe is medicated. With two you can rotate who is offline milking (for animals) and which are good for household milk.
3. It is always good to have another animal to compare... temp, amount of feed etc.
Another thought, the doe must be bred to produce, there are a few precocious milkers, but they are not common. How will you breed your doe? Will you AI, will you buy a buck for breeding then sell or butcher him? Will you find a buck at stud?
My buck had an accident and is in goat heaven, so I will have to get a new herd buck this summer. It is not on purpose that I don't have a buck.
I can't keep one of my own kids, they would quickly get too related, since these are second generation already.
The discussion here is about cheese, but have you considered eating excess goats?
Goat manure is a cool manure, not dangerous on the garden, it is comparable to rabbit manure. You can overuse it, but it is not hot like chicken manure is.
It is also possible to make cheese out of store bought milk... it does not have to be raw.
In some books I have even found recipes for making cheese out of powdered milk.
Cheese making is fun, but you do need to decide where you will get your milk for cheese making. And different animals produce a completely different cheese.
You don't have to commit to raising goats, cows, sheep, or camels even
in order to make cheese.
Go ahead and try making your own cheese, it will taste all the better because you will know exactly what is in your cheese and you can adjust many variables to get the taste that you want.