Sounds like the atomic pi will be perfect since its an intel atom x5-Z8350 with 2gb ram and 16gb flash on board. Will probably have to move the chain over to a usb drive in the future as it grows
The chain takes a bit over 7GB drivespace at the moment, so that would be to move the chain to a USB drive.
For people that are not proficient on the CLI, Verus-Desktop also runs on ARMx64, so a GUI Ubuntu is also an option:
https://pbs.twimg.com/media/ESMYlXNXUAEzzZW?format=jpg&name=largeThis picture was actually used to show the zcash capabilities, but the running native chains are clearly visible.