Yeah I have to keep the herd small for now since I don't have the barn space. Our current "barn" is actually a large shed we converted into a barn. It's nice, but far from perfect and really only ideal for small breed goats and not many at that. Until we have the funds to build bigger, I don't want, nor can have, more than 2 - 3 goats.
As for breeding, I'm lucky to have a family member that lives 20 mins away who has a farm and is an expert on all things goats. I actually got my two from her, and Mocha was already bred when we got her. I plan to breed again next month once they're in heat, and I have a buck picked out from her as well to borrow.
Have you tried joining farming groups on fb for your area to look for goats? I've had much better luck with selling and seeing how sales are going on there than I have CL. I know even the groups can have some sketchy people too, but I feel I'm able to weed them out much easier than on CL.
Goat milk is great for a lot of things, and the better you feed your does, the better the milk tastes. It can definitely have that sour "goaty" taste if their diet isn't rich in a variety of grass, grain, hay, and other vegetal foods, but the milk can be really sweet and creamy if they do get a good variety of those things. I still have yet to learn to make goat cheese. I tried this summer and failed miserably. Ended up saving it anyways as whey to use in baking or something, just so it wouldn't go to waste.