Unfortunately for us chickeneers the 1/2 inch hardwire is the most expensive part of a coop build and not really something that can be found in salvage hunts so setting aside $$$ for rolls of new wire is a must. All coop materials can be salvaged pieces at zero dollars but not the hardwire. For your window box use plastic artificial foliage - it won't put stress on the ledge with dirt weighing down from real pots or flowers. A little trick I use for bare spots in my garden. There's a place for real flowers but with our ant problems we hate to invite them near our chicken housing.thanks for your advice the white trellis is just for show I do have half inch hardware cloth that I will be installing just bought it today at Lowes it wasn't cheap but after reading all the post I guess it will be well worth it.I will be also building a run to the left of it which I will post up