I have been following this thread with a lot of interest. I am curious what you hope to accomplish with the bond?
If you are paying out 100% of the PPS earnings on your 50 GH/s, aren't you eating the power cost? How about inevitable replacement needs? The time you spend keeping everything running smoothly? Is this a one time cash-out by you in order to monetize your (extensive) effort?
Perhaps you are just a benevolent benefactor for the entire community??
The price of the bond is higher than his hardware cost and his anticipated electrical cost over the effective lifespan of the bond. If he is right he comes out ahead. If he is wrong he comes out behind.
Hypothetically if you buy a 1 MH/s contract from you for 100 BTC upfront would you?
Would you consider it losing money even if you needed to pay ~$0.01 per month in electricity?
If 100 BTC if profitable and 0 BTC is unprofitable obviously there is an equilibrium somewhere in the middle right?