I dont agree with this totaly. 300-400 bucks is way to much for 150W sistem. My whole setup cost me around 130 bucks( its a 150w hps clooset grow box).if your poor, you shouldnt be growing. just my opinion. though if you got about 300-400 bucks you could get a 150w hps, and veg with your 23w ones you got.
oh, and expect to buy a carbon filter/inline fan to deal with smell. if you dont, dont be surprised when you get busted