there was already something about the network a few pages earlier. It is no longer a "home setup." Patch panel -> switch 1 Gbit -> 10 Gbit switch connection 20 Gbit -> router 10 Gbit. It is also a 10 Gbit router.
APs belong on the ceiling. Hiding reduces performance. APs per m2 won’t get you anywhere either because local conditions must be taken into account. We have reinforced concrete walls. You shouldn't imagine having reception in the next room. Maybe very weak 2.4 GHz. Since I am tech-savvy, we have more than absolutely necessary. I want good 5 GHz reception in the heavily used areas. In the garage, I have only one access point for about 170 m2. In the "private room area," there are 3 on a similar area. Outside, there are 4 on a total of 2,500 m2.... In total, I have 15 APs.
On the ceiling, you already have some things (smoke detectors, sensors, lamps, controlled residential ventilation...). With a suspended drywall ceiling, for example, you can hide them above an access panel. This only slightly restricts reception. You can also try design films.