Sounds like a great plan! I also use roofing slanted for drainage. Just be mindful of where it lands and splatters. I mount buckets on the down hill side to catch rainwater. I used to bury my wire 1 ft in the ground, but as my pens got larger that was too much labor. Now I strip sod around 4 inches deep and 18 inches wide. Then I turn chicken wire like an "L" down the fence and across the flat. This makes an 18" wide curtain to discourage digging, and digging a 4 inch deep strip is much easier than digging a 1 ft deep trench. Then I place the sod back over the wire and Voila!So I am building the run today. Here is the link for the plans I am semi-following.
http://ana-white.com/2012/06/plans/chicken-coop-run-shed-coop
Except I'm making a few changes. I'm making one side 3&1/2 inches higher then the other side, so the roof is on a slant. And adding panels of coregated PVC roofing for rain & snow. I thought the roofing would be better during the winter then just having hardware cloth. Also, I will be using hardware cloth instead of chicken wire. How many inches should I dig the cloth into the ground? If anyone wants to take a look please give me feedback! I'll take any kind of constructive criticism. Thank you!!