Thanks for the responses, I really appreciate it. I checked out your calculator site, and it seems to be a bit disappointing. I would not be able to break even with an S9 within the first year. According to that, even after 360 days, I would still be $1999 in the red. And with the rate of difficulty going up so high, it seems to not look good even after I break even. Is this supposed to be that way? I am a bit confused, because I thought the whole thing would pay itself within 8-10 months, not over a year.