Raspberry PIs are great little machines, but they’re ARM based rather than x86, which can potentially limit your software choices. Once you’ve bought the PI, a decent PSU, some storage, and maybe a case the cost can also start to go up quite quickly. Another option you might want to look at is something like a refurbishd EliteDesk. You can get a decent spec for a similar price to a PI and those extras, it’s x86, they run quietly, and they’re upgradable if you need more horsepower in future.