Hi Sonny and welcome to Permies, we’re thrilled that you’re here! I believe it’s outside the box thinking that’s at the heart of permaculture. Your idea certainly fits the bill as far as I’m concerned. I would love to see this in a physical form.
I haven’t raised worms in years so my thoughts may be off. Do you think the worms would need a bigger area? It seems like being on the outside would subject them to larger temperatures swings than they would like. Again, I could be way off.
I hope you follow through with making this and keep us up to date.