Last summer, during a visit to Train World, I picked up a couple of building kits made by Ian Wilson Models. One is a VR 20ft portable building and the other is a VR 10ft x 8ft portable hut. These kits appear to be milled from a single piece of styrene using a CNC router and they couldn't be any simpler to put together. I've also given them a first coat of paint, now the next step will be some weathering.