I have zero experience. Its not legal in NC yet, so I have no access to a local clone supply.I do have all the time in the world to invest. 12 x 12 is just a guesstimate. The room is just an average bedroom. I also have a closet in there if that helps. I would like to start out with at least 20 plants. I'm just so sick of spending my money on crap weed that I want to do this desperately.. I'm guessing you are in Cali.