This is a current workup for a KNC Saturn -- for example...
http://btcinvest.net/en/bitcoin-mining-profit-calculator.php?diff=510929738.01615&dcosts=2995&diff_mincrease=30&blpbtc=25&dhsmhs=280000&diff_mincreasedecrease=0.1&btcusd=330&dpowcon=360&btcusd_mincrease=2&pcost=0.15&calcweeks=40&dleadtime=1&action=calc#
You can see the assumptions --
Two week delivery
(One Difficulty jump leadtime)BTC = $330 USD
Jumps at 30% increase
BTC Increases 2% a jump
$2995 USD
etc...
If the numbers hold, you break even Feb 01, 2014. There is no big score you get your money back -- plus $600. That is actually a reasonable rate of return.
Changing this to a Jupiter -- or an advanced Mining 1.2THash box means you might make some decent return -- but maybe not.
Check out other compnies -- Advanced Mining, HashFast, BitFury etc...
Plug in the numbers and draw your own conclusions.
It's really a BTC inflation game now.
