I paid slightly less than 30K for my [upgrade] order of two BFL SC miniRigs, with an aggregate hash rate of 3 TH/s - so why would I want to pay 30K for a measly 400 GH/s?
An absurd proposition.
So is the minirig, at jally power draws, a minirig needs 9KW of power each. It's a portable fire starter and neighborhood light dimmer, and the power bill will each up a vast amount of profit.
the average household only can pull 3kw tops if you run everything you have all at once.