How likely is this to work? KVM/VFIO Single GPU Passthrough

I've been wanting to make a proper switch over to Linux for a while now. I've currently have a dual-boot setup but still mostly use Windows. The majority of my games should work without fuss, but I'd like to have a simple solution for running the handful of things that don't work in Linux, such as my WMR VR headset and a handful of Steam games.

Linked is a video on Single GPU passthrough with KVM/VFIO, which I'd like to try.

Before I try this, I'd like a sense of how likely it is to work, and I'm wondering if there might be a better solution I don't know of. I'm also open to any tips you might have about speeding up the transition between Host/Guest OS.

Here are the specs of my machine:

Motherboard: MSI B550 A-Pro

CPU: AMD Ryzen 7 3700X (no integrated graphics)

GPU: Nvidia GeForce RTX 3070

RAM: 32GB DDR4 3200MHz

Host OS: Manjaro

Guest OS: Windows 10 Pro