I was thinking you did have that. I've seen a lot of in the cheap uses for it, it's awesome. Snake resistant...hmm..snakes don't dig, so the goal would be prevent other things from tunneling under the run. Hard cloth buried vertically arount the perimeter and something smooth like plexiglass...
Cattle panels with t posts should support your netting? Here's the one I got the idea from. He said there's a danger re snow load, but he's using it as a greenhouse so the plastic would block snow from falling through...