What, you don’t have a portable clean room with you all the time? Amateurs…

I heard prints are unique and have a hidden pattern which can be mapped to a single printer. Not sure if this is true.

I’d recommend Paper as server software as it’s more performant out of the box (vs. vanilla)

Only if you don’t play technical minecraft with sensitive redstone arrangements.

OP, if you want performance and redstone, use a fabric server.