Instead of connecting it to WiFi, have a look into power line adapters. They route your internet through the copper wiring in your house.

I have a router in my subterranean ground floor linked to a power line adapter, a wired router in my front room a floor up so my PC, TV, Playstation, etc are connected via LAN, and another power line 2 floors above that plugged into another WiFi router running in bridge mode, which supplies WiFi to the top two floors, and another playstation wired in to that router

Basically it means that my ground floor router is hooked to the internet and everything else in the house that needs wiring in is wired in because of the power line, and the WiFi is coming from 2 routers, one on the top floor and one on the ground.

My ISP thought a WiFi router on the ground floor of a 4 storey house was a great idea, but they're stupid. WiFi should be in the highest point of your house.

With a few Power line adapters you can sort your internet out for £25