Been running my PiHole on a ZeroPi[1] for many years without issues. Initially it was unstable, but turned out I had been scammed and the USB "charging cable" I had bought at the local electronics store had 1 Ohm resistance. Replaced it with a proper USB cable and it's been rock solid since. So solid I keep forgetting about it in fact.

[1]: https://www.friendlyelec.com/index.php?route=product/product...