The assembly video shows the size pretty well. I think the floor space is about 4x11 or 4x12..I only have 4 chickens they would be comfortable in there. I can't say for ten, as for the space inside as it's only showing the exterior. I wish we could see inside
What about a shed for convenience adding a run outside. Would this be easier for your DH?
Due too the inferior workmanship of my first coop I had one made but again I had to have a lot of work done on it