Network planning for a 140m2 single-family house

I will take this:

"TP-Link TL-SG1024DE, 24-Port, smart managed"

It also supports VLANS! Together with a few VLAN-capable WLAN access points, you can then build completely separate networks.

Patch panel? I go for cheap!

Digitus DN-91624S, 24-Port Patch Panel, CAT 6

I also take, for example, the Rutenbeck data sockets and not original Gira, which cost three times as much.

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Bauexperte

I also use, for example, the Rutenbeck data boxes and not original Gira, which cost three times as much.

Actually, it doesn't really matter what you use as long as the standards are met...

All right then I don't have to spend too much money but it shouldn't be the cheapest either. I think 12-15€ per can is realistic

Yes, just take what is available and meets the standards... most mistakes happen during installation anyway, and then a 50 euro box is just as bad as a 10 euro one.