I would like to connect BenQ TK710 (eARC), Sonos Arc, Sonos Sub (Gen 3), and an Apple TV/Xbox/Nintendo Switch/PC. I was thinking that

Sources—>HDMI matrix with eARC

Matrix—> Sonos Arc 

Matrix —> BenQ

Will this work? I know there are multiple threads on this but in reading them I still cannot figure it out with my projector and the set up I need. 
 

Any problems to this setup and any HDMI matrix you’d recommend? 

Thanks