@marcus_w I would suggest to start with Deco mesh in its default Router mode. Conceptually, that would make House 2 like connected to the Internet. House 2 will not depend on House 1 for network...

@marcus_w I would suggest to simplify network layout by having Deco mesh in Router mode and removing Archer C5 in House 2. Main Deco should then be connected to Archer C5 in House 1.

@Tatogonne In Router mode Main Deco runs under heavier load than in Access Point mode. If you have many devices connected to your WiFi mesh, 30-40 and up, changing Deco mode could make a difference....

@Tatogonne I can give you recommendations for powerline adapters. It is rather simple: connect one powerline adapter with Ethernet cable to free Ethernet port of Main Deco, connect second powerline...

@Dandalorian You can also try these things, all together: 1. Turn off 2.4GHz in Deco Main Network, to ensure laptop always uses faster and less congested 5GHz: 2. Find approximate middle point...

@tuli You should be able to do that, with Deco mesh running in Access Point mode. This is how I have it in my house. In very rare case, router may not support Deco Ethernet backhaul, but most do.