Well, I got my closet *mostly* cleaned out... so I officially have about 2' x 3' x 4' (24 cubic ft.) to work with. Thank god I decided to LST... I've only got enough floor space to grow 4 plants, maybe a couple more if they're small (I hope they're not).
When I went to start building my box, I discovered that the rubbermaid tubs I thought I had, seem to have disappeared, so I guess the whole base for my planned setup is out. I'm still trying to figure something out... I might have to use a few cardboard boxes instead. I really only need something light-proof, and something that doesn't scream 'Hi, I'm a grow box for pot plants'.