Don't make it! It looks cool but is not a good design. They don't have any ventilation on the plans
I attached my run with fence staples and enclosed the underneath with 1" welded wire.
The hinge down doors were horrible and I changed them to cabinet type of doors. You can see in this photo the plastic I covered the 1" welded fence with for the winter as a wind break.

If I knew as much as I do now, well I would have built a walk in coop. Hind sight being 20/20 the roof of the copula should have extended out more and the sides covered in 1/2" hardware cloth. The bottom door is covered in 1/2" hardware cloth and is only open in the summer. I did put 1/2" hardware cloth on the soffets of both top and bottom roofs... at least I guessed that part right.

JT