in a 4x5, you could fit two of those beasts. they'd be bunched together, but would fit, esp with some training.
as for the particulars;
gh three part
cal/mag (from start to finish)
superthrive
ph up/down (naturally)
advanced nutes hammerhead
vegged for 8 weeks, then flowered. this is a 15 gallon tall bucket, i had three plants growing at once. had they been in separate containers, i'd have gotten more like 1.5-2 lbs. i learned my lesson about hydro and overcrowding in that experiment (which is what it was, i wanted to try three clones super close to form a monster bush......)
anyway, with four buckets, zigzaged in a 4x5, i think you could def get 6-8oz per plant with 8 weeks veg. it would fill the room, but would be great
also, i train my plants by hand. no strings, no weights, i just bend them over, and let them stand back up slowyly (sometimes they don't want to bend, or seem floppy; niether matters). the next day, i bend them the other way. by doing this, i get constant growth with no slow down or halt from topping, but i get a multi cola plant with no dominant apical tendencies. lots of colas means good yield, and more primo buds per harvest