haha, stealing a puppy, thats cute. of all the things to steal. to estimate your yeild you need to tell me what type of lights your going to use, if clf then how many lummens, the type of the plant, and what kind of soil medium ur gonna use(hydroponic,areoponic,bubbleponic, soil, etc...), the place that u'll grow it(box,closet, etc...) and how long you plan on doing the veg cycle. we can give you an estimate then. 4 plants wont do it,you could grow misty all year and get fucking 3 pounds, or you could grow a small ass plant and get 10 grams. its all in the details mate.