Hello, I have a new single story ranch home that I want to equip with in ceiling Sonos speakers. Looking for some guidance on 6” or 8” and what is the optimal number of speakers + placement in order to cover the living room, kitchen area, sunroom, and all 3 bedrooms. 
 

For the living room I already have Sonos Arc, sub, and 2 One SLs (might need to move these to another room for lack of where to place cleanly without cables showing).

I appreciate all suggestions!