2x2 wont allow you to get a big light that you can use in a big OP later, like a 150w probably. Use a 150 hps with a remote ballast, 70 dollars at home depot i think. Then get pots, four 3 gallons, and some shop nute and soil. this will add up to be around 30 dollars. Then seeds, how tall is the area? I cannot tell you what to get w/o that fact. but you will probably want an indica dom. so you dont outgrow the space and finish if you do indeed move out in 4 months.