This is the first question you need to ask yourself.. "Have you ever yielded even a pound from a grow?"
I can tell you from pure experience, that you can't just jump in the game and expect several pounds, it doesn't work like that. Unless you were some kinda awesome grower, you aren't gonna put together a whole new grow room/setup and hit your target goal. And no offense, but if you were a great grower, you wouldn't need to ask these questions.
It takes time to get a new grow area dialed in, theres so many variables that I could go on about for pages.. The bottom line is, you're gonna need to allow yourself atleast one or two grows for practice, don't set any goals, otherwise you'll be very dissapointed. After then, you will more than likely be able to meet your goal.
Again, I'm not trying to down you, or discourage you.. Just trying to help you think about this in a realistic way.