So you're asking close to 30k for one of these and then we have to pay customs tax.
My calculations go something like this
3TH @ 30BTC - mining from 1st of march 2014 would never see a ROI
Hell even @15BTC you would barely break even on this machine after 4 months and then you would hardly make a profit.
Not to mention the revisions that will come out just like they did for the Jupiter. KnC sold these machines for too much with too little power compared to the current difficulty level.
Sorry to break the bad news to you and to everyone else that got these machines. I really feel sorry for the ones who get their delivery in april/may. Atleast you can mine for a few weeks then sell them off and make something back.
Good luck!
Edit: - Increments are calculated by 30%. Now when KnC and every other manufactures dumps their machines on the market we could easily see a 50% increase every 2 weeks.
It will be Increments of 75% - 80%
Theres atleast 5 Big manufactoers pumping out 600GH per asic