My in-laws and my family live out in the country on adjacent land.  They have high speed internet available to them while we do not.  Therefore we set up a wireless bridge between our houses.  About a year ago, I swapped out their wireless system for a Deco M5 system.  I would like to upgrade our system to a mesh system as well now.

Would the Deco M4 system work with this setup?

Modem --> Deco M5 ~~> Deco M5 --> Wireless Bridge --> Deco M4 ~~> 2 other M4's in my house

--> means a wired connection

~~> means a wireless connection

I'm concerned as it seems there's some issues with the ethernet backhaul which my wireless bridge would probably qualify as an ethernet backhaul.

I'm assuming that the M4's would act as AP's only in the network