Doug, purchase a Mesh Router and position it close to your system. Run WiFi to it. Then run a short, good quality LAN cable from the Mesh Router to your Yamaha receiver. The Supra CAT 8 will do fine and doesn't cost much.
No point going to the effort of fishing the cable and a long run. It will not be better and likely worse as you will be using a more basic LAN cable to save on the cost of the 50ft run.
No point going to the effort of fishing the cable and a long run. It will not be better and likely worse as you will be using a more basic LAN cable to save on the cost of the 50ft run.