[How many 5 gal buckets full of yeast, water, and 5 lbs of sugar, should one use in a small bedroom? any general rule of thumb on that one?]

As someone thats built every kind of sugar/yeast/water reactor I could find...chuck it and get a tank of CO2. The differences I saw made me sick thinking of all the time/resources/materials creating a so-so delivery system. A stunning waste of time, as you'll never produce in the PPM's numbers we need for our fav!
Just my $.02
Y
You are not going to beat a well set up SOG!! I've grown trees, soiless,soil, hydro(full blown KFB set up), SCROG's are fun and all, oh you'll do well here and there, but year in and year out, SOG rules!!