@David-TP 

Similar situation.  I want to connect my existing XE75 mesh to our barn, about 150 feet away.  I bought an X50, which I have connected via CAT6 to the mesh inside the house and the signal easily reaches the outside of the barn, but is not strong enough for me to add another indoor XE75 inside the metal roofed structure.  

I bought two CPE210 units to set up a point-to-point bridge between the buildings, and planned to run CAT6 from inside of the house to the one of the CPE210s that will serve as the access point.  I expect that CPE210 can communicate point to point with the second CPE210 I attach to the outside of the barn.   

Now that I am looking at the PharOS setup instructions in thr CPE210 installation guide, I have several questions:

1.  Is there any advantage to setting up the two CPE210s to bridge from house to barn versus using two X50s in the same locations?  

2.  I see several DISADVANTAGES to the CPE210 bridge just from reading the instructions but maybe I am wrong about one or more of these:
     - I have to download PharOS to my computer and assign it a static IP

     - I have to create a new SSID for the P2P network. 

     - Perhaps DCHP from my house mesh will not extend across that sub-network?
     - I have to align the antennae

     - The CPE units are rated at just 300Mbps (my rural county just got fiber thanks to Biden's infrastructure bill)

Wouldn't it be better to return the two CPE210s, and just purchase a second x50 fort the barn that would have a mesh connection to the one outside the house?

Jim

  @Jellybean_Ranch FWIW,  I decided to go with two X50 outdoor units and they are working well.  Here is how the bandwidth breaks down:

1.  Fiber to house - getting 1GB from the Lumos fiber modem.  

2.  WiFi in house - typically 300Mbps to wireless clients

3.  Ran ethernet cable from the Main deco unit down into the crawlspace, through a small trench I dug to the garage and into the back of an X50 mounted outside the garage.  Getting 200-300 Mbps in the space between house/garage and barn. (150 feet)>

4.  Clear line of sight to a new X50 mounted outside the barn at approximately the same elevation as the one in the garage.  S5. econd X50 is giving my phone 200Mbps when I force my phone to be its client.

5.  Ran ethernet from the back of the barn X50 through the wall to interior office in barn.  Getting 120Mbs in that indoor space.

So far so good.  I have a feeling that the CPE210s would deliver more bandwidth, but I like the idea of having a mesh that covers 100% of my indoor spaces, and 90+% of the outdoor spaces I normally occupy.  Also, I feel like I can easily move units around if I find weak areas.  

Your mileage may vary.

Jim