Also MoCA (coax)

https://en.m.wikipedia.org/wiki/Multimedia_over_Coax_Allianc...

Powerline does not work in my home for reasons I can only speculate. It would take hundreds of dollars of tooling to figure it out.

To the gent suggesting Moca - an option generally, but no coax in the office.

I think a pi or small wireless bridge will probably be the way to go. Or I will talk my wife into letting me drill another hole in the floor.

A pi with CUPS installed will work fine.