Of course adding those items would cost even more, so it is a bit of a race to zero. That said, if you can get a following by homebuilders and into every single new housing project, it might be worth it. I'm sure having some sort of inside track advantage there would be necessary too. None of which I personally have, but as an end user of this stuff, I'd be more than happy to support and provide feedback on.
$800+ for 3 sheets of plastic, and that is it, is absurd. They don't even interlock or have trim for the corners... example...
https://www.homedepot.com/p/WOODBRIDGE-Haydon-32-in-x-60-in-...
Of course adding those items would cost even more, so it is a bit of a race to zero. That said, if you can get a following by homebuilders and into every single new housing project, it might be worth it. I'm sure having some sort of inside track advantage there would be necessary too. None of which I personally have, but as an end user of this stuff, I'd be more than happy to support and provide feedback on.