Here's a video of my coop made of recycled items -- and no 2x4's were used. I am NOT a fan of chicken coops made of wood because of the difficult of getting rid of mites, pests, mold, mildew, etc. I hope you can use some of the ideas in my video.
Spent a couple of days just looking at all the coops here and I found one that was perfect for me. I am still going through the coop designs for ideas such as nest boxes, storage, lighting, and other amenities...Great site. maybe I'll figure out how to post mine someday...