I might do that... I might use some black plastic sheeting that I have laying around too... at least to "prototype" it out and see if it's a good fit/feel.
\
Gilligan, here is my drying cabinet.
Made in the corner with 2x4's, and some old paneling for walls. It has a "Fart Fan" on the top and few holes on the bottom.
I used silicone to close up any openings and weather stripping around doors to block any light when the door is closed.
Cost, $30-$40 for all (I had paneling)