>>291698151
The CPU is a little weak, but it should work, so you could probably get by with just upgrading the graphics card.
>I purchased a $550 rock (but I can play rollercoaster simulators on my phone hurr durr)
They're not going to look as good as the PC versions, but there are plenty of good Quest ports you can play standalone, and you can always just pirate them if you're determined to only buy PC VR stuff for some reason.