I sent your drawing to my DIL who is getting her juveniles the middle of next month. There is a Canadian blogger I follow who built a coop similar to your design. Here is her link if you are interested. This the finished coop, but there is a link to building it, it's not technical and really doesn't give information but it's funny! https://www.theartofdoingstuff.com/the-coop/
Her door is in the middle of the run vs the end There are many things I like about her coop, too.