The fence is made from fiberglass screen. An HO scale fence kit costs about $20. Fiberglass screen from ACE Hardware, which is the same as what comes in the kit, costs around $1.00 a foot.
Virgil, next building is a bank. Probably made from high density polyurethane foam. I'm going to build some HO scale cars and trucks first. I need a little break and something to take to the NNL.