For whatever reason I cannot select the right model.

Anyway, the situation is the following:

I got a house with three floors. I want to create a super good Wifi on all flors, but also use the CAT6 cables that I have installed in the house during my rennovation last year.

So: I got one CAT6 cable which goes from the central place in each floor, to each room. Then I got one CAT6 cable, going down from that central place from each floor, to the basement. So I got a tree-like network.

My plan is, to go full TP-LINK hardware. Which means, I want to buy 3 switches (8-Port, I do only need 3 ports for those 3 cables going to each room, I got that on every floor, but then I need the fourth port also for the Wifi-Router and the fifth is needed to get Internet from the basement on the switch. Which means if I go with a 5-port switch, I wouldn't have any free port - if required....)

So I go with 3x TP-Link TL-SG108 V3 8-ports Gigabit Network Switch.

For each those floors I would use the TP-Link Deco XE75 Mesh WLAN Set (3 Pack) 

I would connect them to the switch. The switch is connected in the basement to my DSL router: TP-Link VX231V.

That one is connected to the internet coming from outside the street to my basement.

Would this set-up work? I couldn't see any videos or someone explaining if I can connect all three DECO XE75 to the dsl router/moden, usually they would always connect only one, and then connect the other DECOs to the previous DECO, like in a chain. But what I would have is more a tree/star schema.