The kit (below) includes two small stockyards or one big one (depending on how you build it). I chose to build two smaller stock yards (more flexible) that can be jammed together if necessary. There was also a leftover shed and loading shoot and (with some card) enough to make a couple of corrugated steel fences.
This was a fairly fiddly kit with lots of look-alike pieces. The first one took me about an hour and a half while the second one took only 45 minutes. I secured some sand to the base using future (what can't that stuff do?) and I will prime and paint when the temperature comes up about 10 degrees outside.
I downloaded Super System 3rd Edition last week and I'm keen to have enough terrain to pull off a small game soon. I could use a couple of more small buildings and some accessories. I've also built the next 18 15mm cavalry--again, awaiting decent priming weather. And I pulled out some old HO train cars for rolling stock sitting on a siding.