i have 1 plant, and my whole apartment stinks...
if you really want to try then you can try a box, use CFL's to keep the temp under control, and use PC fans for ventilation...
look up dressers or entertainment centers around your area in craigslist, or if you want a cardboard box (I use cardboard and it works fine, if you don't mind the fire hazard) and try to make something out of that....
PC fans are here:
www.newegg.com; look up case fans, they have them for 1.49 apiece...
you will need a DC converter, go to radio shack, or ebay, or craigslist.
clamp lights, Y sockets, and 42 watt SoftWhites and 26 watt Daylights....
about 150 dollar investment just to get it going....