We made an attempt at creating a dodecahedron from 2x2s. Here's what we learned.

Mass producing the individual chords was a relatively quick process when combined with a jig.
producing (10) pentagons took us approx. 2 hours.
End screwing each pentagon proved to be difficult and ultimately was structurally weak.
Pentagons failed on minimal amounts of shear. Shear plates would be necessary.
Zip-tying each pentagon to create a dodecahedron wasn't stiff enough in a lateral direction and resulted in a pretty clunky looking shape.

All of these has lead us to consider a few things. We can stay the course with a dodecahedron shape but to create a safe structure we'd need to either create an expensive custom connector or use our hinge method. The hinge method is viable if we create a single polyhedron but based on our model tests it appears that multiple small dodecahedrons will be more aesthetically interesting than a single one. We'll quickly over-run our slim budget it we need to buy hundreds of hinges so we began to research off the shelf star connectors. While we couldn't find one that would generate a dodecahedron we did find two cost-effective systems that will generate a polyhedron of a similar size. Both construct domes but one will result in a single frequency dome and the second will create a double frequency dome. Once we select an appropriate system we'll then begin to refine the interior experience of the space.

Dodecatron Mockup #2