0.5 BTC for 300khs: Am I right in thinking that it would take 2-3 months to break even?
Possibly 550kh/s or more per the firmware spoken of recently...
3-4 months depending on luck and possible exchange rates. But consider there is ZERO hosting fees for the life as long as you have good standing in GB#4.
Consider that after the ROI this is basically free BTC weekly...