The Pi’s are so over priced right now. Go on eBay and buy a old office desktop like a SFF HP. There are tons of them well under $80. Pair that with a SSD and now you have a cheap home server that can handle a node plus a lot more
Discussion
Funny you mention that, I’m running two old PCs to do something similar, I have a raspberry pi model 3 running pihole but I think going forward I’ll pick up another recycled pc
How much ram do you like on those HPs?
I put 16GB in mine but I don’t use over 6GB. Save your money and get a bigger SSD. A 1 TB minimum or if you are planning on using it for more than just a node go for 2 TB