@Ellisz
You really can not use more than 3 routers (AP). You can only use channel 1,6,11. Overlapping channels in close proximity make thing worse. The main thing is to use a different SSID and channel(1,6,11) of each router(AP).
Three routers(ap) on the same the same SSID , will not help at all with collisions and high traffic load.
A guest network use the same channel as the main network, all a guest network is , a different login and different security. You will still have collisions.
Ok. I misunderstood. Using 3 routers I will be good with. I do have mine all set up with the same SSID so that I can fix. The Guest network is just used to limit access to the local network as I had no idea of the radio traffic issue until now. I have only been using the guest network for a short while though. Is there a negative to using a separate primary and guest on each router? I used to use port forwarding in the router to view remotely but I now use the VPN functionality to view from outside the network.
I have a lot to learn.
Thanks