One of the things Juergen had to do with his brother and sisters was to clean out the room of their father. He was living in an assisted living home. He did not have many things anymore. But he had a coffee pot from his 25th wedding Anniversary. And everyone said it should go to Jürgen and I. I'm not really sure Jürgen was even aware it was a silberhochzeit kaffeekanne. He just knew it was fancy. And he gave it to me. And I cried. It was like receiving a gift for my 25th wedding anniversary from the two of them.
Why not start with an IBC and cut a hole for the door? You could build closed laying boxes into it, and something for the chickens to roost on. Put some straw or saw dust on the floor. You could add vents to the side for air. If it sat inside a chicken run that you can walk into, the chickens could be safe, dry and happy. I have an extra IBC. Maybe this could be my chicken house? I bet I could even plant the outside of it with mud and grass for extra insulation and good looks.