One thing you will want to do with your space before you start growing is to install some sort of reflective coating on all of the sides to get the full benefit of your lights.

If you can't afford something like mylar or panda film, what you can do is paint all of the walls a flat white, or you can adhere white printer paper to large slabs of cardboard and install those on all sides of your space. It does make a difference when you are using a HID light (HPS or MH). If CFL's are what you're bent on using, you can hang lights at different levels to penetrate the inside of the plants and skip the reflective preperation stage.

The autoflowering strains you have chosen don't get very tall, but I have a friend right now who is growing lowryder 2's outdoors and they are 6 feet tall...either that is the most effed up mutation ever, or he was sent the wrong beans.......

Cheers, try posting some pics and we'll see how this goes man!

SMG