Homeplugs (ethernet over power) are fine for some things, but they add so much latency to the network.
Wired is so much better.
But I wasn't facility. I was a student.
The dorm itself did not have internet and had no plans of running ethernet or providing internet to students.
I got internet through a wireless access point, positioned very carefully in window for a WISP. And they distributed that to rooms near me.