I really enjoyed the video. Saw it 20min after release. I’m really happy to see tech-yt (jerry rig everthing also did a video some time ago but with a clickbait title like “we have a problem”) show of that even the ultra expensive versions will pay for themself after a couple years and then it’s bassicly free money/energy.
Pi Zero could be underpowered but the bigger pi’s sound like a perfect match. I would recommend looking into a used pi 3 or 4, because the pi 5 is new and always out of stock (at least in europe) so you pay around 150$.