In my case I'm renting and where the Internet comes in is in the other room. I got a good router and WiFi card though (the first WiFi card I bought was highly rated garbage though. Would drop off 5g whenever downloading something for awhile, like through steam)
My desktop and wifi are both the image on the right. When I first bought my desktop a couple years back, it had only around 4 gigs of ram. I also live in an apartment, so Internet is only occasionally okay a specific times.
That's how I have my home lab set up until I can install a networking rack in my hall closet and drop some ethernet. Just bought two cheap netgear routers and set them to bridge mode.