Yes, the setup is very stable. I had an issue with one Antminer S2 power supply failure, and one Jupiter hashing board failure, but otherwise it has been rock solid.

I've had a lot of the equipment for months, so most of it is already paid off, and the setup earns many times what it costs in monthly hosting fees. Even the S1s are still fairly profitable, and when they are no longer profitable, I will sell them on ebay and replace them with S3s.

It's funny how people are speculating about how much I pay per month for hosting when they have no clue.

Rest assured that I can do basic math and am confident that I'm sitting in a fairly good position right now...