Just realised that in my previous post I haven't replied to the thread itself; I'm running a few full nodes already and I'd happily run one 24/7 only if I had a low power-consuming device such as a phone/Pi to run it on.
It depends what kind of Raspberry Pi device you are using for your bitcoin node, and I know some people who are using Pi4 and run full and pruned nodes without any issue, but important thing is to have enough RAM and solid hard drive.
Yeah, well, Pi's with >4GB RAM and decent storage are way well over $10 so in this price range you only get the Zero, which is practically useless..