Speaker and sub placement

I’ve just finished work on a new house and could use some advice on placing speakers. I’ve got an Arc Ultra for video, and that’s more than adequate for our TV needs, so I don’t need to connect anything more to it. But for music, I want more – both for casual listening throughout the combined kitchen, dining room and living room, and for somewhat more focused listening (or at least the best and loudest sound) in the kitchen itself.  My working assumption has been six Era 100s mounted high on the walls, plus a sub, as shown below.  But is this optimal? Should I be going in a different direction? Thank you!