After working for several years with styrene, I had doubts about wood-and-cardboard kits. This one did not disappoint. While the instructions and parts dont always coincide due to changes over time, and some parts have precise but not accurate dimensions, if you think through the building process before you start and have some flexibility as you go the result is worth the effort.
I prefer to cut the sandpaper roofing into scale three-foot strips to simulate roll roofing, since that would be used rather than a continuous hot-mop surface on these sloping roofs. I use Tacky glue, which makes a good adjustable working bond but tends to curl the edges, so you need to weight or clamp the strips and work methodically. Also, if you paint the walls (I thought white was too pristine for a lumber yard) you can avoid warped walls and visible bits of excess glue by spray-painting after all the basic parts are glued together.
The bundles of lumber provided with the kit are generous but all the same large (HO 10 x 10 beams) size. Smaller basswood strips are available from other sources to model a range of typical framing lumber sizes. Heavy, tan colored paper can be used for plywood.