I am looking for a small house with a roof wide enough for panels. I've found one and i'm evaluating seriously to buy it. The geographical position in which I live allows me a good solar irradiation all year round, obviously more intense in summer.
The costs are as follows: a 4 kilowatt power system with 6-8 panels costs about 12-15000 including assembly.
The technician I spoke to at his house has 14 kilowatts with 18 panels (I didn't even ask him for the price).
Free energy in any case.
I'm also thinking of doing as in Siberia and putting 3-4 asic antminers in the cavities of the garage wall to warm up a little winter for free too.

Sorry, a bit off topic..
That's not a bad solution. Now let's get back to the topic.