Why not just get a Gig-E LAN switch and use the Ethernet backhaul?
Wireless backhaul has so many "ifs" whereas the Ethernet will be
consistent as it's a dedicated connection. I used to have a home-office
setup with Netgear 5-port GigE switches cascad...
I have a similar issue, but I only have one Point. The Point in it's
current location works great for about 24-36 hours (after restarting
it), then the WiFi starts getting poor, and I cannot do any "Hey
Google!" commands to it ... (after restart) I t...