...
- Far better ROI than any investment fund, bank, etc (100% in 4 months - with the current difficulty rise)
Hum, not sure about that.
400Mh/sec would give you ~0.02BTC per day or ~USD2 per day or USD60 per month... (at the going BTC/USD rate).
So given the cost of 350+20+70=$440.00 it would take a little over 7 months to recover the cost, (closer to 7months the more you order of course).
Even if the current difficulty does not changes, (and it will), and, this is also excluding electricity and so on...
So my guess is that it is a 1 year investment, at least.
FFMG