Two networks both using PLW1010 V2 for the headend

I have two completely different networks headended by two routers connected toa single Arris cable modem for our two building residential property.  One network already has a PLW1010-100NAS with two remote wireless adapters.  I now want to add another PLW1010 headend with a single wireless remote to provide both a wired ethernet connection for a small switch and better wireless connectivity.  Just as with the already installed network I'll use the same network SSID to facilitate device roaming.  Each network has it's own distinct non-overlapping IP structure.

What problems if any can I anticipate?