I live in a three story home, a typical European row house (so completely built from concrete, with wooden doors), and have my Unifi Dream Machine in my utility

I live in a three story home, a typical European row house (so completely built from concrete, with wooden doors), and have my Unifi Dream Machine in my utility closet where the electrical board and my home server is, and my a Unifi U6 access point at the top of the top most stairs. It is completely sufficient for 30 wireless clients.