How about using Powerline-adapters, for example Netgear?
I use 6 of them instead of ethernet cables all over the house for years now and they work flawlessly. The better ones nowadays have an AC outlet, speed up to 1200Mbit, powersaving and 2 Gigabit ports. Solves all the problems with rooms that are out of reach. Just plug one in, sync with the master and put them where you need it. The WiFi-adapters also replace bridges when you want another hotspot in the cellar or garden or where is bad reception for your iPad. Only drawback: they constantly draw some current.