are you doing this in a house? if so you are going to need a lot of AC power. have you calculated your hydro bill? if your planning to make money from this; i recommend you to not bother at all. if you just want to pay your bills and have 9 to 5 job. just do 3 lights max
your looking around 65000 to 70000 btu or 5.5 to 6 tons of AC
cheers, hope this information helps on your decision making.