We want to get goats too, not for breeding but just two or three wethers for pets and to help keep the blackberries from taking over our field. Realistically, this will not happen until next year at least, because we have too many other projects we need to finish first. Which is OK, because it gives us time to research how to care for goats.
We have the metal frame for a 10'x20' tarp carport, and we plan to use that by building a floor a couple feet off the ground using cement deck blocks and railroad ties (our property is by a river that floods every few years, so we want them to have a large indoor area they can escape to from their field) bolting the metal frame to that, and attaching a real roof. plus wooden fence panels around it for walls.
From what I've researched, the main things goats need for a safe and secure area is fencing they can't break or climb out of or dig under, and a warm, sheltered home that's away from wind and rain.