I built everything. I wrote an article on how I did it. You can take a look there for how I laid things out and how I built things. It's a lot easier than trying to explain everything here.
For that many birds (shooting for the recommended 4 sq ft per bird) you are going to need a sizeable building, like a 16x10 shed, that you could then convert into a coop. I converted an old shed on my property into a coop and it's the best thing I ever did for them and myself.
Offering a...