Might recommend getting a second phone line for the other end of the house.
But a telephone engineer will have to run a cable from where the telephone service cable meets the property to wherever the outlet is needed. It would also mean two line rentals and two broadband contracts!
As mixture suggests fixed cabling is the way to go. I have a couple of fixed cabling connections to my router. The advantages are speed, security and robustness of the connection without any effort or user configuration. Wireless is invaluable but can at times be a PIA for those reasons!