While researching tabletop war games I came across some nice looking printable buildings. I made one and printed it on Manila paper. From a distance it looks like a Kato built up. Here is the link. http://www.hawkwargames.com/blogs/downloadable-buildings
Here's a printable building I drew on Photoshop that I have posted before. Interior visible through door. How it goes together. What it looks like.