[sam345]

I've had luck running HA and node red on a pi 3 but with 250gb SSD drive, responsive and reliable. I think that's the bottleneck. You can't use SD card. Also must use AC adapters specifically for pi, usually slightly above 5 volts and 2 amps I think. Also pinhole must be on separate device I agree with that.

[late_groomer]

Yep, I could have made it a better situation with some extra addition$ (I always put my Pi on a quality AC adapter from the start, those constant command line voltage nag warnings had their intended effect), but the cost of the SSD + another Pi is actually more than a used SFF device with a substantially more powerful Intel processor that comes with a M.2 SSD. It's amazing what you can get for < $50 these days. Great time to be alive for us tinkerers!