How does self hosting change the power consumption? Don't you still need to power those devices? If you're running fully on renewable, sure you have a point. But if everyone self hosts, the power companies still have to fill the energy gap, right?
I can also get away with no powered cooling for my gear. ie: I need cooling well before my gear does.
Well, that does make sense with your username....
(And it's been pointed out to me before that there's a "Zalman" company making computer cooling equipment! What a coincidence.)