Wow. Someone who has been reading, and not learning. Seems to happen more & more here in America...
Yield estimates are based on a literal fuckton of variables.
How many people know about the grow?
How many grows you got under your belt?
What kind of soil, fertilizer, and nutrients will be used, if any?
Any other techniques(LST, Topping, etc) that you would be using?
How cool is the spot you picked? Are the plants going to be visible from the air?
And the most important one! Are you a legal medical marijuana grower?
And even then yield estimates can be way off.
I will humor you, and say you will get anywhere from busted(for bragging too much) up to 30lbs! Depends on you really...