Also its probably somewhat like someone turning off their car in the drivethru or something then turning it back on two minutes later to "save gas". Even though it burns more gas doing that because the car injects extra fuel to start lol. No idea if that'd be true with pcs maybe that initial startup uses more power than just turning your pc to sleep for a few minutes. I dunno
your computer with no apps open and few background processes running probably consumes 70-120w.
Turning it on/off frequently for short intervals of time is more OCD'ish then problematic, learn to use sleep or hibernate. Or set your screensaver for 2min. POST and BIOS are not gonna surge anything, they just verify everything works then your HDD boots Windows.
The only potential problem from flicking it on and off is for non SSD harddrives but even then youre unlikely to have any problems.
HID bulbs for grows or in DLP tvs or projectors are an example of something you want to turn off/on as little as possible because everytime the bulb is striked to turn on it depreciates the life expectancy. Also CFL bulbs flicked on/off often can consume as much as incandescent.
