My "closet" setup (yes it's total ghetto):
2 - 24" florescent dual fixtures with 2 Cool white bulbs and 2 sunlight bulbs (walmart $29.94 for the fixtures, and another $20 for the blubs)
1 - 24" blacklight fixture with GE Ecolux Plant and aquarium bulb (walmart $6.97 for the fixture and $4.97 for the bulb)
1 - wardrobe closet with the middle removed (Home Depot $102.99)
2 - febreze True Air (walmart $29.94)
1 - replacement filters for the fabreeze (walmart $14.97)
4 - 120mm fans (radioshack $19.99 for 4 thermaltakes other wise it's $19.99 each)
1 - timer (Walmart $4.97)
1 - humidifer (walmart $29.97)
1 - desktop fan (walmart $14.97)
So far i'm up to $280. but that doesn't include the pots and medium. i lucked out and snaged a few pots from my parents, and the soil around here is the best that i know of (we even export it to other parts of the country). I also had some extra 12v power supplys laying around so that didn't cost me anything. I've added a few more things, but all trivial; weather stripping to seal the lower compartment, roll of tin foil, and wall paper roller(Yes i know never use tin foil, but this is my ghetto grow closet). I also have a web cam, and software that takes photos every 30 mins. yes, i'll post the video once i get it done. the only other thing that u might need is:
1 (maybe 2) - 12v 500ma (or <1 amp) power supply (ies) (Radioshack $19.99 - $39.99 depending on the amperage)
so right there is $300 (not including tax witch i luck out on and don't have to pay)
Hope this helps. I'll try to upload a pic or 2 of my setup.
I still recommend the febreze true air. if it can eliminate my kitty litter box it can defiantly eliminate the oder of a plant