I will be a bit (or a lot?) Fanciful in the theoretical plane, being inspired by @ krakonos'em.
It has a relatively inexpensive source of power, independent of the system and the desire to do something in cryptos. The question is how to do it, and especially what?
BTC? It is known, its current price is more than appealing. But does domestic mining pay off? Mining equipment is expensive, the demand for mining for energy and calculations is high, the possibility of earning for individuals uncertain.
ETHER? Not much easier than BTC.
LTC? Here I can not judge.
What then? I guess I'd like to get some gaming desktop PCs with enough memory and a powerful graphics card to start with, as I would probably choose a Linux distribution, find out the right software and try MONER. With a cheap power source and low-cost mining equipment, Monero seems to me to be suitable for the first domestic mining attempts.
And now I'll leave it to you. I expect serious criticism. Of course I can see it from my point of view and I do not expect exclusive assurances ;-). This would not even solve @cleverbot ;-)