Let's look at some numbers here. Please let me know if you calculate them with different results.

1.) Electrical cost going forward: $80 per miner * 30 miners = $2400 per month
2.) Rental cost of power supplies: $5 per miner * 16 miners = $80 per month

Total monthly cost: $2480
Total monthly Btc:  $4160 (from your previous post)
--------------------------------
Total monthly income: $1680 (difference from above)

Six months income: $1680 * 6 = $10,080

Six months (July 10th to January 10th), I'm assuming the difficulty would have increased significantly by then.

1.) That's also assuming all miners are up and running at 100% all the time. With the heat coming this summer in eastern Washington I would expect some downtime and possibly lose some miners to overheating.
2.) Again you would need to calculate the difficulty increase. 5%...10%....20% over six month? 10% would knock approximately $1000 off the six months total income.
3.) What will be the resale value of the S7's and power supplies when the contract is over (~2017)?


Let me know what ya think?
      Are you open to offers?

Thanks much
--TW