if you want a low cost solution run a 5 gal bucket swamp cooler it will drop your temp about 10 to 15 degree (see how to make one at eplaya.burningman.com)
bongsmilie
in the summer time controlling the heat so your plant keep growing i have found that if you use swamp coolers low cost i made 4 out of a 5 gal bucket and
i live in the south so it gets hot it can be 95 outside and 75 to 85 inside
try castle marijuana seed you can buy just one seed at a time for $2 to $14 for what strain you like that way you can try more strains and not spend a lot of money
try white kc it get nice and frosty or blue dream,white widow black widow, norther light ,big bang big bud but you will need some...
you want to use a horticultural perlite go to www.schundler.com they make the shit perlite is inorganic mineral of volcanic origin
making material is made from oil you pick
if you go to web page aa.usno.navy.mil/date/ and put in your info were you live it will tell you how much darknees you have and that will tell when it will strat to flower
plants strat it flowering with less then 12 hours of light and it will finish with more then 12 hour of light