Best four zone receiver / setup ideas

I’ve got a two zone receiver and a blusound dac as my Roon access point that feeds two analog channels into the Denon. Right now I’d like to do four zone at least independent volume control since my other 3 pairs of speakers around the house are all on Zone 2 and I have to manually switch them on from the main room and have no independent volume control on the 3 other rooms. Considering a four zone receiver since adding zones to the HEOS is set expensive and Sonos port and amps even more.