About the hardware cloth: I've found that 3 and sometimes 4 layers of the cheaper chicken wire is strong and it works well here. I do use hardware cloth buried ~12" below ground and appx 4' up the sides of my pen. The outdoor house has hw cloth under it, but that is probly overkill as the house is inside the pen. Neighbor uses electric and can't say enough great things about it.
I, too, have HW cloth buried around the perimeter of run (& part of run covered by metal roof, extension covered by HW cloth; all sides of run HW cloth ). Birds are stuck in run during the day unless one of us are home; then we let free range.
I have gotten my HW cloth thru Amazon where I have found it to be 50% cheaper than Home Depot/lLowes, etc (free 2 day shipping w/Amazon Prime). Think I paid $70 for 100' of 1/2x 24" x 100' a few weeks ago (Mat Midwest is the seller thru Amazon..)