your 1000 watts is way to big for your space.a 4 by 5 garden space would be great you could keep 15 to 20 plants there and let them grow pretty big keep the light 2 to 3 feet above the top of the plants.an easy way to save money is just to flower with the hps and veg in a window maybe or under cfls.i veged 150ish plants under cfls this season and my bill was never over 65$.currently i flower outside though.i am getting the stuff together to start my indoor garden.i am going sea of green so that i dont have to worry about having alot of lights on all the time maybe you should give that a try.with a 4 by 5 room you could easily fit 70 plants that way.keep it up and good luck.hope i helped:thumbsup: