It's possible to keep just a bootloader on the SD card, and have everything else on USB storage, so if the SD fails the data is safe and you just need to set up the bootloader again.
IIRC, Nomad doesn't do well with having clients on distant networks; you could have a server/client at each friend's house, but I don't recall off the top of my head how service discovery would work in that case. I'm…
It's possible to keep just a bootloader on the SD card, and have everything else on USB storage, so if the SD fails the data is safe and you just need to set up the bootloader again.
IIRC, Nomad doesn't do well with having clients on distant networks; you could have a server/client at each friend's house, but I don't recall off the top of my head how service discovery would work in that case. I'm…