if u got 20ft container, id go SoG, aeroponic, as many as plants as u can get, and use 4-6 1000w hps....
1 x 6" intake fans, 1 x 6" wiv carbon filter for outtake.....
1 x 12" fan, 2 x Y ducting connecters, 20-30m ducting....to pull throught the lights......cold lights = 2-4" from plants...