Hi I have in hand some m9 plus ,m4r  and e4r , I li in in a penthouse on the 4th floor and would like to reach the garages -1 so 6 floors of concrete to pass trough on top of each other 3 mtrs apart each approximately to do so I asked my neighbors to plug in 1 device on each floor in return I share my public internet account I have 1gbps down 60 up I'm finding it difficult to get stable connection should I sell my equipment and get something else make use of what I owe ? Garage supply to use smart plugs and cctv do I need m9 on each floor instead of m4 e4r as reapeters and if so a floor apart or a device on each floor ? Can you please guide me also they liked the idea as not so much congested networks and radiations from multiple routers and channels thanks in ad