if you want to grow in soil, and you need to save some cash, you could start out with a bag of low nute soil (brands like fox farms light warrior or ocean forest, scotts premium potting soil, or miracle grow organic) some solo cups to germinate (assuming youre starting from seed), a plastic tray for water drainage, an oscillating fan 6-8" (you dont need anything too big), lighting- you could go with a couple inexpensive screw in cfl's with bowl reflectors 23-65watt are the least expensive and you could just add more as your canopy's area gets bigger. After you have all this, you could paint the closet flat white, or purchase some mylar, which you can get from a hydro store, or if thats not an option, you could get an emergency blanket from the outdoors section of a wal-mart, target, etc... this will suit you for 1-2 weeks, then you will have to transplant to a larger container (and you can make your own out of old milk jugs, garbage bags, or many other things).... hope this helps... happy growing!