If you have 3 rooms use 1 for moms & starting clones, 1 for vegging clones, and 1 for flowering. Just start a batch every week to eventually have a perpetual harvest of a few plants at a time to keep a constant flow and not have tons to trim at once. End up harvesting say 10 plants a week instead of 100 every 8 weeks if you have room for 100 plants (in a SOG). I don't think you need to LST with a SOG, in fact you want single cola plants. You should cut off all the lower branches that don't receive light so it focuses all its energy on that top bud. You shouldn't veg long at all before flowering in a SOG, just enough to get good roots and a few inches tall.