I’m a huge fan of Ubiquiti stuff. People that dog it usually don’t know how to set it up. For that size house I would put one AP like the uap AC on each floor. Mount them to the ceilings in the center of the structure . Also you don’t really need to get a POE switch unless you have a need for other POE ports for other POE devices like cameras etc. because each Ubiquiti AP comes with its own POE injector. The Ubiquiti Edge router X is also a nice little router with plenty of throughput capability for home use. So from your provider just get a modem (wired) for a route to the internet.