Great article with fabulous plans and build photos!
I would suggest that anyone using these well-presented plans in a hot climate skip the soffit and fascia boards and use hardware cloth to create soffit vents and to also either use a ridge vent, larger gable vents, or both.
I used to see this coop every day on my commute. It lasted until they closed this school down to build a new building and, to a commuter's eye at least, it stood up well to use and weather.
Excellent build photos and explanation of the process of working with pallet wood. I think that a competent handyman could easily duplicate it.
The only thing lacking was photos of the interior layout and actual plans, but I have to give it 5 stars for ventilation, suitability for the intended climate and location, and for my personal knowledge that it stood up well to a climate that is fairly brutal on wood.