Quote from: bitcoin0918 on June 17, 2011, 12:00:36 AM

I'm curious what calculations you used to determine that you could break even or make a profit with such a setup. What rate of difficulty increase did you assume, and over what period?

I assumed initial depreciation of 0.15*base price for unboxing, then 0.003*base per day thereafter, with mining profitability at a conservative 1.3cent-day per megahash (including electric costs). Giving the profit function including hardware resale where x is in days of (22.1*x)+(1800*(0.997^x))-2070

This gives 16 days in the red assuming hardware liquidation.

Without liquidation, ((22.1*x)-1800) which comes to 81 days.

We're currently at 2.2cent-days per megahash, so this is very conservative calculation wise on mining profits, I'm assuming the worst Huh