Still, I am considering it. The tentative plan is to buy a five year old (about) computer, install about 8 or 16 Gig of memory, Maybe a Terra byte drive for the OS and the node code, then a raid of SSD Terra byte drives for the block chain. (I presume the block chain changes little so SSDs will last quite a while and use less power. Make it a RAID-5 (not positive) in the event that when one drive fails it can easily be replaced with no loss of data.) This will not be my daily use computer and will be dedicated to the node.
You don't need 1TB SSD for OS and code/software. Although these days SSD with 1/2 or 1 TB capacity have good price/capacity ratio than SSD with lower capacity.
To the question: Have you considered running a Bitcoin node? Why did you or why did you not start a node? If you are running a node, private or working for a company, have you any important thoughts to share?
I currently run full node. I'll just share that i store blockchain on HDD (which i already own) without serious problem if you allocate few GB of RAM for Bitcoin Core.
On the other hand, a Raspberry Pi cannot run a full node with the entire block chain.
An RPi can definetely run a full node. You only need to add an SSD to store the blockchain.
And some patience for IBD due to limited RAM capacity / CPU speed. Although it's not needed for Raspberry Pi 5 which released recently.