I have definitely researched the heck out of this! I am building my own, with help from my loving (and patient) husband. I recently learned how to use a miter saw and a few other fun power tools so hopefully I won't be in too much over my head-but if that happens I have him to help.
I'm planning on roughly 10'x6' for the whole structure (coop and run). The coop will be raised about 2' off the ground, situated at one end and 4'x6'. I had to get a permit here and will have to have it inspected when I finish. Personally I feel that is overkill, and going to add to my cost bc they have specifications I have to follow.
I attached my most current sketches.
The nest boxes I haven't drawn out but will be 2-3 along the front section, possibly a bit of extra area for storage next to them bc I know I don't need 4.