Thats cool, just that you said go big. In my opinion do more than 30 cuz you could get a really nice set up goin on. Know anyone who could do a tap ? I recommend it if you can get it done. You dont absolutely need AC's, theyre nice and all but use way more elec than a swamp cooler. So depending on where you live (humidity outside) you can duct a nice big swamper to be your intake and it will cool your room aswell. I still say use 600 hps for flower atleast, because they are more effecient than 1000 W hps . Get lumatek digital ballasts agrosun red bulbs with dew guard to hang them all 600 HPS. Hang 4 in your flower room. I personally just use same 600 hps for veg too, some perfer halide, i honestly dont see a huge diff Ive used em side by side in seperate rooms. Id put 2 600 with setup listed above in veg- set up ur intake/exhaust for that one and get a nice thermostat. See if you have this big building, what you do is build another one inside. So then you dont have this cheep looking shed with AC's/and or Swamper hangin out the windows. You put em inside and just duct em out (even paint the intake/exhaust outs and ins to match your lumber) make it look liek it really is just an older building. Thats my opinion : )