You're on the right track with something small and wethers.
Check out my website...I raise grade and registered Nigis and have a couple wildcards in the doe herd, too (like a silkie fainter who flunked fainting school and a couple Pygmys).
Bear in mind that most people in our state call ANY small goat a "Pigmy" (yeah, they even spell it wrong)...when you go to look at them they're just small mutts. If you can get them off their dam and bottle raise them (must be done EARLY) then they might be tame, but most people around us have wild goats. Shop around, learn to know what to look for. A quality wether should run you from $50 to $100 here (ie a registered one), where a crossbred wether would be more like $25 to $35. Also, some breeders will throw in a wether when you purchase one or two does.