Good plan.What breed to you raise? I am keeping my old coop for breeding purposes. I have a Maran pair and several Maran/EE crosses and an Ameraucana. I’d like to make my own F1 and F2 olive eggers and pure bred Marans. I am starting small for now! The remaining flock are my “rainbow flock.”
The coops page has a link for large coops. Some will house 150 or more chickens.
https://www.backyardchickens.com/articles/categories/large-coops.20/?page=3
I raise Black Penedesencas. They are the dual purpose variety of Penedesencas.