I'll start this off

here's how I would like to re-set up.

veg:
4 banks of 6 T8's (cheap at lowes/homedepot ~80 plus bulbs)
passive air in, air out goes through hps lights in bloom.

flower:
4 or 5 600w (replacing 4 1k now - only running three atm b/c of summer heat)

I have an AC unit, but am not convinced it's more useful than setting up an economizer solution - venting indoor air when it's above a certain temp and the outside in below the same.

I am running CO2, at about 1100ppm. leaky room, so just using it for a push.