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Running 600W for 12 hours a day at $0.10 per kWh costs $0.72 a day or $21.60 a month. Heat pumps can move 3 times as much heat as the electricity they consume, so roughly another $7.20 for cooling.
All electronics double as space heaters, there’s only a minuscule amount of electricity that’s not converted to heat.
Yeah, I was swimming as a child and eventually took lessons later on. It’s like second nature now, not knowing how to swim seems like not knowing how to walk to me. I can’t imagine what it’s like. I never swam competitively or for exercise, just for recreation.