I can snag supplies, not an issue.
This coming weekend stinks for me, any other'd work. Let's let Rob chime in, and if he is shot for it due to work, I'll build his if he's okay with that.
After seeing the light, I'm thinking open topped - the light leg setup hits all four corners of the tank, so making a canopy that doesn't interfere with the light legs is a little problematic (and after having it explained how hot the little light can get, I'm not real fond of the idea of attaching it to the wood above - I can work up a canopy plan if you want to try it though.

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In poplar I believe it was about 16 bucks of wood for the base, so you guys know. I should have enough putty to touch up corners, so no issue there...