this is what I do, and it's fairly cheap nowadays if you just buy 2nd hand, I actually go so far as having virtualbox VMs for some of those within the same computer (say I have my "important accounts" computer that has some virtualbox VMs with each a browser with only some of those).

Gaming is a windows PC that has only games (so who cares) and a ps5 (so I can rent games at the library for free), development is a linux PC (where I containerize most things, as well as firejail etc.), web browsing is an x86 imac, I don't do socials, I also have a completely separate linux PC for art/drawing.

The vast majority of these has been bought for a couple hundred dollars 2nd hand from ebay or local university surplus (say they have all the time m1/16gb/500gb for $300-$400 imacs, or dell 16gb towers, or tons of dell laptops), the only expensive one was the linux development one as I bought a 5950x/128gb when it came out, but it has served me well, as long as you stay away from windows/mac you can go very far with really cheap hardware (DDR3 is plenty for banking / browsing / socials / factorio).