How do I switch from Wi-Fi to Ethernet cables?

Not everyone has a DAC that relies solely on usb.  Timing does matter.  I have had at least three streamers, at varying price points, where the Ethernet connection was audibly superior to the WiFi.  I urge the OP, if he isn’t convinced, to run a long Ethernet connection as an experiment, even if the cables are temporarily in inconvenient areas, and compare to his WiFi,.  For the purposes of this experiment the cheapest CAT-5 will do.  If he doesn’t perceive a difference, then just optimize the WiFi.  If he prefers wired, then make the one time expenditure to get his house wired.  A competent installer shouldn’t require more than an hour, and doesn’t have to be a music business specialist.

I would feed the ethernet cable through the walls and put a jack on the wall. Makes life so much easier.

Seems your modem is part router, otherwise not sure you’d have Wi-Fi.

Once you have an ethernet Jack on the wall, you’ll have a better connection to feed a network switch that can provide digital Signal more conveniently to a lot of different destinations

Don't complicate your life with all this extender stuff. It's not rocket science.

FYI, I also use. Node 2 using wifi. I use a RME dac with it and I had a lot of dropouts and constantly had to reboot the Node and my phone. I moved  the Dac and the Node apart from each other and my dropouts stopped. There is now an 8 inch separation where before they were butting up next to each other. A simple solution 

I mentioned at the beginning of this thread that you can buy a router that accepts a SIM card which means you don't need hard wired internet and still get 5G.

So MESH etc. is not required.

Seems like the ethernet over powerline adapters (~$40) to an optical segment and back just before the streamer would proved the most flexibility.  The optical portion, with a nice short shielded ethernet cable to the streamer, can be had for under $100.(newegg)

My node2i always had signal issue with wifi, 2.4 or 5, with no walls between wifi router and it. It isn’t the wifi spec, it is the interference and the specific streamer device’s capabilities, and internet service, that are the issues I have had with audio wifi.  Innuos pulse mini now, no wifi on it.. with an optical section… much happier now.