If you are buying stables check with Planning first, our goat house in a sectoin 75 category field, and we would not have been able to get anything "horse" in its name onto it! (Anything with "horse" needs full PP unless moveable, however if you have a CPH you can try and use "agricultural notification" for anything classified as for farm animals.)
I am in the Borders just off the the A68 at St Boswells, so if you are coming our way you could have a look at my goathouse - designed by us and we built it ourselves too. It is 10ft by 18ft, with a central door and entrance/milking area, and two 5 by 8 pens on either side. Hurdle type hay racks serve both, and we have double glazed windows (from a skip I have to add!) with a wire mesh to portect the glass/goats - but I wanted light in there. The house is quite high, as I want airspace/ventilation. The upper part is louvre-typed planks, so it is really well ventilated and quite cold in winter. Goats don't mind and I have so far not rugged mine. We have double-wide door, so we can get a trailer up close and load any deadstock if required. Our doors have an internal wire-mesh, with the outer wooden part can be opened for light and air in winter/rain. Our internal divisions are about 5ft high, which the goats have been known to jump across, but only if really spooked (and not the GG's, but the BT's). Everything is wooden (with concrete foundations), and screwed (rather than nailed) together, so can be replaced/changed if needed. My OH loves to work with wood! We have both water and electricity in the shed, really needed for winter milking, and the goats need to have BBC Radio2 on during the day... (their choice not mine!)
I have atm 3 adults in separate pens, with two BT goatlings sharing the fourth pen, and the adults pens have a corner divided off for the kids, as I am milking the girls.
I do have a whole lot of photos, but up-loading is difficult as we seem to have a problem with broadband/email etc with up-loading anything bigger than 200kB, don't know why, but it seems living rural comes with that sort of problem...