I think you do best to have just two stations in a powerline network situation because the contention and overhead of contention control is much less. (Compare that to gigabit ethernet which is full duplex and switched so there is little or no contention)
You can connect a "distant" powerline NIC to an ethernet switch and plug multiple devices into that if they are close together, that works better than plugging in multiple powerline NICs.
Unfortunately new houses have circuit breakers that detect broadband noise caused by arcing. These are good for catching fires early, but will blow if you use powerline NICs.
I have an older house that has been expanded several times, with some rather amateurish wiring. One outlet works, the one next to it doesn't. Slow speed, interruptions that require resets...
Google wifi pucks work much better, in spite of the cinder block walls.
I think you do best to have just two stations in a powerline network situation because the contention and overhead of contention control is much less. (Compare that to gigabit ethernet which is full duplex and switched so there is little or no contention)
You can connect a "distant" powerline NIC to an ethernet switch and plug multiple devices into that if they are close together, that works better than plugging in multiple powerline NICs.
Unfortunately new houses have circuit breakers that detect broadband noise caused by arcing. These are good for catching fires early, but will blow if you use powerline NICs.