I would recommend a wall wart wifi extender. Ethernet over power is not a good solution.
I use this solution and a know of a number of outstanding high end systems (>$150K) using it. High quality streamers take care of any shortcomings.
Reducing noise in an Ethernet over power configuration
I don’t have the luxury of a separate Ethernet outlet for streaming so I’m using PoE. I’ve never been impressed with the sound quality of my EtherRegen feedin my Sonore UltraRendu. I’m seeing products from iFi Like the silencer + that coul eliminate some of the noise. Has anyone used one of these products for this type of application?