@terziyski Thanks for the reply. The buildings are far enough apart that probably there will be zones between without wifi, as long as the wifi exists and devices connect to it seamlessly once in range I will be happy.

As for the Arcer C6 AC1200 as the main router, do you think it is good enough to pass gigabit internet between the houses, or should I get something more powerful, for that building wifi is not important at all.

  @terziyski Thank you very much, I bought the items to test and then setup.

  @terziyski 

Hi again, so I finally got to setting the layout up but the easymesh doesn't seem to go to ethernethaul. It stays on wireless and says it has a poor connection. Main router is c6 and satellite device is ax55, both were updated to their latest versions.

  @Jarro 

Right now I put the ax55 into apmode to work as an ectender of wifi. Although ax55 is updated to the latest firmware 1.2.6 it still doesn't show support for easymesh. I can only set up onemesh.

  @Jarro 

Hi you can use all 3 to distribute your wifi between all 3 buildings, 

I would personally use the AX55 as your main as I think the ax55 is the better of the 3 and have the 2x C6 1200 as your access points in the 2 other buildings. 

Before I upgraded to 3xAX72's I was using 1x AX72 as my main unit then the 2x C61200 as access points, 

Yes the C6 routers are GB but I believe that's only on the LAN side of things not via WiFi from my experience, 

I'm on a GB plan and I could never reach anything over 650-700 via wifi when connected to the C6 router. 

My old c6 had quite a large wifi range where I could still pick up the wifi signal on 5ghz at least 150ft away from the unit, 

Granted the link speed was low in the picture but when you factor in the distance and being on 5ghz aswell as having flats/apartments to the left and right of where I was standing in the photo aswell as having houses on the left and right in front of me in this picture I can safely say that the channel congestion was probably quite high yet on 5ghz I was still connected at that distance. 

I would like to say  from my experience depending how or where you are able to place your routers aswell I'm sure you should be able to cover quite a large area with wifi between the 3 buildings 

How I set my routers up was I had the main unit set up as normal with my own ssid/passwords and then I set up both AP with the same ssid and passwords and then put them into AP mode then connected them via the lan ports on the main unit to the wan ports of each AP and thats it. 

For you as you will need outdoor rated  ethernet ( direct burial or normal outdoor rated ) depending how you choose to run your cable as normal ethernet won't be able to handle the outside elements 

If you want to connect devices via the lan ports on the AP routers then you can as the lan ports still work 

I do get the odd delay of switching over via wifi but generally I don't have any issues, 

Some devices might need a nudge by turning the wifi on and off again. 

  @terziyski 

The c6 offered the easymesh option. It was the v4 as you suggested I should get. FW 1.13.2. I will try to update the ax55 and see if I get easymesh working.

If I add the third router to the easymesh network does it need to be close to the main router or can I set it up to have air link with a satellite router?