Multi Room Using Spotify Connect

[swarve78]

Has anyone figured out an option for multi room For Spotify Connect?

 

I have a Naim Uniti Atom in lounge and Bluesound Powernode 2 in the patio and I’d like background music playing in both areas. 
 

I also have a Synology and some Raspberry Pi HATs and working in IT I’m fairly technically astute, just don’t have a huge amount of time to research. 
 

please don’t suggest Tidal and Roon. My kids are obsessed with Spotify and I can’t do both!