If I were you I'd try to grow 1 healthy plant at a time in smallish pots, LST'ing the ever-loving crap out of them...I have a 3x3x6' tent and I came to realize after several months that I could get a lot more (and a lot better quality) bud by LST'ing less plants in a small space than by trying to put more un-trained plants into the same space. For me, my tent is the perfect size to grow 1 photoperiod plant, topped once, fimmed 4 times, LST'ed to lower her top colas. That right there was on track to net me 8 large main bud-sites on a 75/25 sat/ind hybrid, photoperiod of course. Growing autos, you can't really top or fim, so I'd actually leave more room to LST than with a photo.