How much space do you have?
How much bud do you smoke?
Home much money are you willing to spend over a 2 month period (three major purchases)?
There are a ton of ways to grow, and the size of the plant, and the method and time, can all contribute to different results.
Personally, I think you could do some great things with:
$70 - 150w HPS System:
http://www.bghydro.com/BGH/itemdesc.asp?ic=HLCSHPS015SS&eq=&Tp=
$35 - 150w CMH bulb:
http://www.elightbulbs.com/catalog_product.cfm?source=GoogleBaseCSE∏=PL130229
$9 - Two 2 gallon Smart Pots:
http://www.igrowhydro.com/Smart-Pot-1-Gallon.aspx
$6 - Two Botanicare CocoGro Bricks:
http://www.igrowhydro.com/CocoPeat-CocoGro-Brick.aspx
$9 - One Quart bottle of Botanicare CNS 17 Coco Grow:
http://www.bghydro.com/BGH/itemMatrix.asp?GroupCode=NLAACNSC&eq=&MatrixType=1
$9 - One Quart bottle of Botanicare CNS 17 Coco Bloom:
http://www.bghydro.com/BGH/itemMatrix.asp?GroupCode=NLAACNSC&eq=&MatrixType=1
$8 - One 8oz bottle of Botanicare Hydroplex:
http://www.bghydro.com/BGH/itemMatrix.asp?GroupCode=NEGHPLB00&eq=&MatrixType=1
$50 - One 2'x2' flood/drain tray:
http://www.igrowhydro.com/Tray-White-22x22x7.aspx
$90 - One 2.5'x2.5'x5' mylar tent:
http://cgi.ebay.com/REFLECTIVE-MYLAR-32-x32-x63-HYDROPONICS-GROW-TENT-ROOM-/310286202592?pt=LH_DefaultDomain_0&hash=item483e7fb6e0
$20 - Clip on circulating fan:
http://www.bghydro.com/BGH/itemdesc.asp?ic=AEFCAKCLP06&eq=&Tp=
$70 - 4" inline exhaust fan:
http://www.bghydro.com/BGH/itemdesc.asp?ic=AEFCPVL04&eq=&Tp=
Add in a few other odds and ends, a thermometer, some party cups, a bucket to mix your water in, maybe some RO water...
You're looking at less that $450 in total.
This setup could grow you two very moderately sized plants that will harvest around 1.5 ounces each. 3 ounces total, every 100 days or so. Figure 4 ounces sells for around $1000... I think it'd be a pretty good investment to save yourself the money. You could then smoke about almost a gram a day, every day, pretty much indefinitely so long as you keep growing in there. Technically you could get away with 4 plants in that tent if you kept them small or upgraded to a 250w or 400w system
but for two plants the 150w will suffice I think. Maybe add in a few CFL bulbs or something for the extra side lighting at a low cost.