interesting question and that reminded me of what someone was talking about last year (maybe not 100% related to your question). I don't know if he was trolling or was really doing it but it sounded very interesting.
mining in the middle of a desert!
you will get the below 0°C temperature during nights which last nearly 9 hours. and then you get the direct sun (the free source of electricity) for the rest of the day which you can use to power up miners and set up a efficient cooling system.
the setup may need a big investment but the cost from that time forward is practically nothing.
That's actually.. quite smart.
When I'm thinking of good places to plant a mining farm I've always focused on low temperature countries and countries with low electricity cost. The desert would be the last thing I would've think of. That's an interesting idea, though I don't know how you're going to setup a cooling system for temperatures THAT high.