I proposed doing a DIY class and building some of these as part of a summer DIY workshop + picnic-type event (club buys the materials and food).
While I really like the idea of a meeting where we make something, I have to agree that it would be a bit much.
Construction is a minimum of two full days and three is much better. The base primer has to cure for several hours (best overnight) before adding the epoxy. Then the epoxy has to set up for several hours (again better overnight) before adding the sealant coat, which itself needs to dry overnight.
We could make "throw away" backgrounds where we do not let the layers dry, but material cost for even a medium-sized background is around $40.
I love the idea but have to agree it is not practicle.