First off, how do you arrive at the 25 figure?
Is that due to space, or do you have 25 seeds?
Do you know how much room you are working with?
How long are you going to veg if at all?
What kind of time frame?
What size pots?
Follow Uncle Ben, you can grow 25 plants on a couple shelves, and end up with a few pounds if you do it right.
You have a join date of 2009, but 130+ posts, have you done any research at all or are you gonna run out and scoop a shovel full of dirt from your driveway?
You gotta give some parameters for this hypothetical grow man.