We live in a society

As you have apt in your sudo file? Or maybe you just log in as root?

I would probably go with a microcontroller and something like this: https://learn.adafruit.com/emc2101-fan-controller-and-temperature-sensor/overview But your orange pi can drive it too

Worth depends on the target you want to achieve. It’s part of the equation.

It’s bytes downloaded divided by bytes uploaded. Torrents are distributed so more often than not you download a file from several seeders