Hello, I am currently looking for a Wifi 6 mesh system and have identified various TP-Link products. I would like some orientation as to which one best could fit my needs. I have included a rough sketch of the construction.

The only note of this construction is that the walls are made of brick and supported by concrete columns and beams with rebar.

The overall area to be covered is 4,100 square feet

I am looking for a Wifi 6 solution, maybe 6E if not cost prohibited

I will be using Cat 6 cable

Is the layout illustrated in the image adequate? I am open to better options.

Will the one mesh node upstairs be enough to cover this area?

Do the nodes need to be connected directly to the router? I ask this because if none of the mesh nodes need to be connected directly, then I have some flexibility to the mesh node placement. For example, I can move the mesh node near the router to the opposite wall.

Is the Ethernet backhaul, as shown in the image, correct?

Which TP-Link product is recommended for this scenario?

I appreciate any feedback/orientation. Thanks!