Finding specific words in an MP3 log file for our radio station. Free app called Vibe transcribes locally.

I don’t think GPU are used for bitcoin any more? You need ASICs to be able to hope for any return on investment.

These might be worth trying, I don’t know.

https://www.womenshealthmag.com/life/g44762001/best-wearable-neck-air-conditioners/

If it’s not overly humid, evaporative air conditioners are a cheap to run way to keep cool. The personal units (Convair Classic etc) are typically about 50 to 80 watts, so a single solar panel, battery and inverter should guarantee safe, grid free cooling for one or two people.