My idea is to use connectors to turn the 12 scraps into six supports necessary to add 40 feet in length at 4 feet high. ANd then trim the banners to 12 feet or so, and add 8 grommets per end. Bungie to the edge of the shade and suspend out to the 4 foot rail. anchor it down, done. a bunch of sleeping shade.
for privacy and separation/decor purposes, i can grommet a dozen 8 foot lengths of the banner, and use zip ties to hang them vertically.
what do you dudes think? it's about $100 for all the rest of the parts; seems like a great way to use these scraps, and get some stable shade. anything super glaring i'm overlooking?

Oh- one initial concern is the vinyl is pretty heavy. it would probably be much simpler and more stable to pay $50 for a couple more big tarps, but then that adds to an already stretched budget AND loses a little of the scrap charm. But it is an alternative.
