Why don't you just get the Coral TPU? The price is $69-79 on Amazon.
I was on the same boat except for no GPU or iGPU pass-through. I tried Shinobi, but I got too many artifacts. Motioneye was too CPU hungry and no audio. Zoneminder was the only one that worked for me, but the motion is kind of hard to calibrate.
A year ago, I purchased the USB Coral TPU and setup Frigate. So far, Frigate is the best I have tried. The only missing piece is continuous recording. I want to do the setup that I had with Zoneminder, where I could chain a continuous recording at the lowest resolution. Then, if motion is detected, Motion record at the highest resolution.
I was on the same boat when I was running NC on a container. I switched to VM, and most of my issues have been resolved, but collabora. I am currently using the built-in collabora server, which is slow.