If your birds will be inside under cover a lot, then your coop will need to be bigger than one you'd design for 5 hens. Give them more space to be inside and not on top of each other where they will get annoyed with each other. Also, I would build a roof over your run so they can be outside all day long without getting drenched. Did you check out the Medium coop designs? That's all I did. I just picked out a couple I really liked and then built my own from those ideas. Pay close attention to the runs attached to the coops- and look for ones that are covered and how they did it. My coop has a shingle roof, but I am just going to use corrugated metal for the run set at an angle for run off (like a loafing shed) because I need it to span more distance.