I tried a power line adapter for the basement - it does work in the basement but somehow it makes the entire internet connection unstable which is weird and not productive.
I resolved the same issue isolating powerline adapter in a separate vlan. I feel that powerline do not like broadcasts.
But i got the devices without wlan do how can it interfere with my existing wlan? Also Im using a switch for my rigs so it should not affect the regular hardwired connection. I was so glad it works in the basement:(