Using your criteria it's much worse than that:
http://mining.thegenesisblock.com/a/cc632f9ecb
With 0 pool fees, misc costs and electricity you still wouldn't even earn back half what you put into it.
This is assuming your assumptions are accurate of course, but any way you slice it, it still doesn't look good.
Topic: BFL ROI - page 3. (Read 3526 times)
Am I reading this right?
The difficulty growth rate over the last 3 months has been about 100%/month.
So even if I get a 60 GH/s BFL miner (EDIT: at $1299, before the price increase), and start mining on October 1, with free electricity (which I don't have), assuming the 100% growth rate per month continues for the next year, then at the current exchange rate, it only just barely breaks even? A.K.A. Zero ROI.
(Mining dashbord.)
The difficulty growth rate over the last 3 months has been about 100%/month.
So even if I get a 60 GH/s BFL miner (EDIT: at $1299, before the price increase), and start mining on October 1, with free electricity (which I don't have), assuming the 100% growth rate per month continues for the next year, then at the current exchange rate, it only just barely breaks even? A.K.A. Zero ROI.
(Mining dashbord.)
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