Homeplugs (ethernet over power) are fine for some things, but they add so much latency to the network.
Wired is so much better.
You only need the MoCA for the back-haul between distant wifi access points or ethernet switches, not in every single room. Unless your walls are made from literal sheet metal, a wifi signal should get through at least one, and ethernet cables along the baseboard and under a doorway are fine too.