We have a similar situation in the house. The house connections are in the basement. A router located there would no longer reach the bedrooms in the attic. Repeaters are more of a makeshift solution because they only amplify the (possibly poor) signal they receive and sell it as "very good." However, I also don't really want to have a WLAN access point on every floor. LAN wiring to all rooms (patch panel) will be done. I am currently considering placing the WLAN router in the house connection room and a second WLAN access point in the attic. The ground floor would then receive its signal from one of the other two, which in the best case would be "good." Alternatively, a WLAN access point in the kitchen could also work, as it is the most central point in all 720°. I just don't know if it will be enough for the floors above and below or if we will be unlucky. I hope there are sufficiently powerful WLAN access points on the market that can also penetrate reinforced concrete. If unlucky, I could help with additional WLAN access points. I just hope not to block a good option later due to poor pre-planning. If all necessary structural work for laying LAN cables in all needed rooms is done, I would later simply try by trial and error what works well and thus approach any necessary more expensive measures. What is your view on the structural necessities?