Can I piggyback into this thread? I've been reading about mining and as I understand it it's not really profitable unless one has a big profesional operation going on. If that's true then how come so many people are still buying individual rigs for themselves?
It doesn't matter how large the operation is, it simply matters how much you paid for the mining hardware, how much you mine, and how much you pay for electricity. A small operation that is more cost-efficient than a large operation is, well, more cost-efficient (duh). You could have a small mining farm run out of a house that requires no additional security, cooling, electrical wiring, etc. that relatively outperforms a large operation using the exact same mining hardware because the large operation has additional overhead costs such as rent for warehouse space, security, cooling, custom wiring, etc.
Thank you very much for taking the time to answer my questions. You've given me lots to think about.