Haha I like your thinking.
I would like to have gone with a 600 watt hps, but with my veg and soon to be clone room running a 200 watt MH (once I upgrade),and some floros. Then once the bud room is finished Ill be running two squirrel cage fans and a scrubber. My electric bill is maxed I have to keep the bill fairly unnoticeable for other reasons out of my control.
I have already bought the 400 watt hps lamp set up also
and like you said this is my trail error stage (thumb in mouth stage) once I tinker a little bit and I do not get the results I expect I will more than likely upgrade. But if I figure something out and it works I can take over the world!