I have it running on an Orange Pi 5 with the Rockchip NPU, very impressed with that being supported and working so well for object detection.

single camera?

Two cameras, CPU usage is very low (NPU spikes when there’s movement). I suspect I could add more without too many problems.

wow.. thats sounds very promising.

Can you recommend a quality online community that do the same thing that I could lurk in for while to soak up some knowledge??

The documentation is rather scarse on performance numbers, but it looks like the hierachy of price/performance is like Intel iGPU ("free"), Intel A310, Nvidia GPU.

I'm explicitly leaving out the Coral TPU, since it's been reported that the newer Intel CPUs (Core Ultra) seem to provide the same performance with it's iGPU.