So, if Meridian not only puts storage, but also a core into a QNAP, then all you need is an endpoint. I.e. an MS200 would be enough. That would make quite an affordable entry point for a Sooloos system!

Meridian G68 AXV, HD621 | Cinepro 2k6mk5 | 4x Scanspeak A4 monitors, center & 26W Sub | RPi Hifiberry digi+ | Roon