PCB designs, Ethernet, and PoE

First off, I am working on adding Ethernet to my ESP32S3 designs. I am going for an KSZ8851SNL SPI Ethernet MAC+PHY, mainly because the ESP IDF has a module for this - so it should be a couple of lines of code (LOL). I am also going for a Silvertel PoE module. At this stage I have designed, and ordered, a board to allow me to prove the concept. It is somewhat more expensive than I hoped as I am…