We invested in a 60 gh/s box in late july early august, and also had a super computer that is worth 12k that can do 65 gh/s.  That is why the investment is so high.  I know we overpaid even then, but I was a noob and kind of got talked into it.  If we only just bought bitcoins then, life could be a little different.

If I was mining with 125 GH/s would you join a pool or keep it solo?  We have zero electricity cost, and the total investment is around 28k.  However, we have yet to find a pack, and want to try and make something back