Ok hardware cloth ordered 150 ft of 1/2". I have several 2x4's and a few 4x4's already from a previous project that i didn't start. I plan to use them to stabilize/build some type of cover for the run. I know there are owls and hawks where I live.
I haven't had an owl, but have most definitely had hawks. I'm sure you have both hiding in those woods behind the house. I know you are putting out a lot of money right now, but you are building a very safe pen that will last you for years. A pen that size would hold 20 chickens easily, even 30 if you wanted, so you are off to a great start.
I meant to ask, are you getting day old chicks, or started pullets?