Another way to get something supposedly more stable than wifi when ethernet cabling is not feasible is to use your house's electric wiring and run data through that. There are kits which offer data rates in gigabits (although based on a few reviews I read the actual speed vary greatly).
https://en.wikipedia.org/wiki/Power-line_communication
https://www.tp-link.com/us/home-networking/powerline/tl-pa70...