I bought a pretty decent setup for second-hand. fanatec dd wheel w/boost kit, fanatec load cell pedals, quad 1440 (something) monitors i think 24 or 27", some sort of unreal pc that runs it all (32gb ram i think?). In all honesty, I'm pretty clueless with all of the hardware part. I got super lucky in that the guy I bought it from was a PhD student so obviously knew exactly what he was doing and was super helpful in moving the rig and getting me all set up. Was pretty literally plug-and-play on my end.
For VR, I have the Oculus Quest (now Meta) which I run through link cable to the PC. It's unreal, and I'd totally run it all the time, however the racelab displays don't work in the Quest -- and -- every time I switch from the triples to vr and back, it messes with the FOV as well as the placement of all the info boxes. It's really annoying.