Thanks guys, exactly what I was looking for. I'm gonna explain myself a bit better:
The room my pc will be in (parts are shipping now, mini ITX build, budget around 1k $) is actually outside my home, but shares a wall with my parents' bedroom, which is in turn pretty far from the router. Since it's a flat and we don't plan to live here forever, and we have complaining neighbors, running an ethernet cable all the way to that room, even inside walls, is unfortunately not an option. WiFi barely reaches the place, and my thought was 'Yeah, my bandwidth is already crappy, so I don't have anything to lose' so I thought that it was worth a shot. I don't have bandwidth needs as much as latency ones, so I wanted to know if it was worth a shot. I'll probably buy a pair of powerline adapters until I can get ethernet to the room I'm in, so thanks for the info guys