Dear @alankelly,

The more I think about it, the more I'm convinced that I actually need 4 CPE210's to connect all three buildings.  Each building will have a managed switch (for phones) and an access point for internet.  I was handed the EAP225's, but the more I look around, the more it seems they are not going to work in this case. I wonder if the building on the end of the run will have solid internet, or if it would degrade in any way from going from building 1 to 3 without direct lines.  As much as I'd like it, fiber runs are too expensive.  Any thoughts on this?

The CPE210 only works on 2.4GHz and adopts 100Mbps Ethernet ports, if there is heavy wireless interference on 2.4GHz, it's suggested to choose 5GHz CPE instead. And if you need high bandwidth, the CPE710 may be your choice as it's equipped with a Gigabit Ethernet port.

Additional note:

The CPE710 has a very small antenna beamwidth(9° Azimuth/7° Elevation), which concentrates energy in one direction only.

To ensure good communication, we need a 1^st Fresnel zone clearance, and the visual line of sight doesn’t mean Fresnel zone clearance.

See https://en.wikipedia.org/wiki/Fresnel_zone#Fresnel_zone_clearance