I'm currently using a six-zone #JukeAudio for a 3-zone multi-room system. Those currently sell for $1500, so $250/zone if you use all of them, $500/zone if you only use half.
https://www.jukeaudio.com/product
The UPL-Amp is a single zone for $600. It offers 3x the power (130W vs 40W per channel), a physical user interface, and much better connectivity.
hmm I really need to hook up more zones to get my money's worth out of the Juke...