An Occulus Rift S is about entry level as you can go as far as
PC BASED VR is concerned. There are stand alone models that are cheaper. But they have significantly less power. There's some glitches with the Rift S however. (Just do a youtube of Rift S and see what they like and dislike)
The more pixels you have to pump, the meatier a system you will have to have.
I would say:
- 2070 Super ($500)
- 16 Gigs Ram ($100)
- 240 Gig SSD ($40)
- CPU AMD 2600 $169
- AMD B450 MB ($100)
- case ($50)
- 500 watt PSU ($100)
~$1060 give or take for the PC Side
I would consider this entry level. You could go cheaper, but your system will quickly become dated. VR makers and programmers are quickly pumping the pixels up.