Electricity isn't cheap at all here and I do live in a small apartment, unfortunately. It's why I want to know if just making some changes to my main desktop PC would be better, as that would allow me to save on space, electricity, and heat.
I do have two Rasperry Pis right now. One of them I run Pihole on at the moment.
That's a good idea. Too bad I've recently just built my current PC and won't upgrade for another 5-6 years, though. I've also passed down my old one to my sibling.