Here is what I would do if I were OP. I'd go to a local computer shop and pick out a refurbished Dell PC that is reasonably priced, have them upgrade the RAM with 64GB DDR4. I would wipe Windows 11 and burn a bootable ISO with Obscura OS, or some other debloated preactived modern Windows bootleg, or a Linux distro if you prefer that instead. Then you have a gamer PC that can handle pretty much all modern games and/or local open source AI with the total expense around $1,000. Otherwise, if you are not into intense gaming or local AI there is no need to spend that kind of money.