So thats it? Just make sure different channels for both? What will happen if both routers running on the same channel?
It's no different than if it was you and a neighbor. Assuming you were within range of each other, each would create radio interference w/ the other. It doesn’t even require another wireless router. ANY device sharing the same channel (freq.) can have the same result. Many other devices use the 2.4GHz freq as well including cordless phones, microwave ovens, radio control equipment, etc. Any one has the same potential to create interference. So you need to use different channels to create separation.