Another option may be Powerline Ethernet. If you need dedicated Ethernet, you can hook up one end to your router and the other unit would be where you need the connection. If you only need WiFi, then you could put a WiFi router at the remote end. If you need multiple Ethernet ports, then you could add a switch at the remote end. Speeds on Powerline are Gigabit these days so it should work well unless you need 2.5 GB or 10 GB.