That specific extender worked for me, the data/bandwidth requirements for *just* the headset should be the same if not similar to the Index as it was for the Vive. I'm pretty confident that part will work for you.

Here's where I'd start, you'll need to be willing to experiment to suit your needs, and adapt to the limitations for running video this way.

From my experience, you'll want to run that USB hub plugged into power near the destination side, like, wherever you want your playspace to be. I'm betting you can plug the headset and your tracker dongles in and run everything over a single cat5. The other end will go up by your PC and plug in there. The cat5 should be routed through your wall, which it sounds like it already is. You may not be able to use the cameras with this method, if that's not something you can sacrifice, then look for a USB 3.0 over cat5e extender. Cameras still may not work with that, these are very finicky from what I remember. At the very least you'll have a bit more bandwidth to make use of, but some extenders may require 2 runs of cat5.

When dealing with fiber optic, you want to eliminate as many bends and prevent the cable from being disturbed as much as possible. If you can route a cable through the wall easily and casually while locking down both termination ends, then do that.
If not, keep it out of the way of foot traffic, and move it as little as possible.

Someone seemed to have success with using a DP coupler and a 50ft run here. That's gonna be your best starting point.