Earlier quoted context omitted.
Home electricity bill of a decent GPU alone is usually more expensive than renting GPUs on demand.
Do you have any numbers to back that statement up? E.g. I have solar panels and a home battery and pay less than a $100 a year for electricity.
Solar panels aren't free. And aren't hassle-free either.
I wouldn't even bring that into the equasion since a large part of the population can't use solar panels.
Not to mention GPU value depreciation.