I am posting this because I have used so many of the ideas that I have found on this site. Like everyone else ....I will pass on my mistakes and small victories. It's 6X6. So far, I am very happy with the nest boxes and the floor. My wife found a remnant piece of industrial lino at a discount store. I got the windows for a good price on e-bay. Thing I would change: I didn't leave enough space over the nest boxes. I guess they can sit up there and watch me do yard work. I threw some tar paper on the roof to keep out some rain until next weekend. I have to admit, I have had more fun on this project than most! And weekends don't come soon enough. I have had some help from great friends and my kids. A lot of memories are being made. Next steps: Trim Roofing Siding Doors Run - I need to figure out the best way to level the run. Comments and suggestions welcomed. I will update my progress as I go.