Weather you've seen plants yeild that much is irrelevant,thats a huge goal & a goal not easily achieved,you will allmost never be able to reach that goal using any amount of cfl's,it will require lots of HID lighting & some pretty skillfull growing to keep a plant healthy long enough to harvest a pound of weed.
Being that space is an issue with you i'd say forget trying to grow trees & start learning about growing single cola sog style,its the method i use & prefer over monster trees & ive grown monster trees,the single cola rotating sog style is the best yeilding style in a 12 month period.