I think I've found my coop design. After much debate & discussion...DH and I have finally decided on something like this:
My dad saved several wooden screen doors from my grandma's house when he tore it down. I hope to build the run around grandma's wooden door. The sound of those doors clap-clap-clapping shut bring back so many memories.
Since we have a huge yard fenced with privacy fence, I think I can clip the chickens' wings and allow them to do some free grazing. If that doesn't work out, I'll come up with a portable run that can be moved around the yard during the day.
DH and I are both college professors, so it really helps that we have summers off to pursue gardening & homesteading efforts. I'm teaching an online class this summer, so I'll get some summer salary and be able to work from home. It's a pretty good compromise.