Right, we had our first freeze in a couple of years this year (teens, and a few single digits) and our summers top out around 105, but those are peaks, avg... I'd say 20-90 degrees F
I'm not a pro but I do some woodworking for fun. The biggest thing I've built from scratch was a picnic table, from box was a playset.
I have many types of saws, drills, drivers, sanders, levels, squares, etc.
For your climate and your level of skill you should consider a Monitor Roof -- the best decision we made for our current coop.
My Little Monitor Coop is too small for your needs, but the design should scale up nicely and my article clearly shows how to frame the monitor. https://www.backyardchickens.com/articles/the-little-monitor-coop.76275/