Why Roon, why Sonos, why Tidal, Qobuz, or any of these? Each one is a walled garden in a different flavor. I don't mind spending money to support developers of open software. But I absolutely do mind supporting MQA.
To me the audio hobby has a been life-long journey (still spinning records now and then). Why Roon? Honestly I don't know. I operate 2 Macbook Pro's, 2 PC's (Dell790, NUC), 3 Raspberries with transports and DAC HAT's. There are also 8 different DAC's, various headphone amp/DAC combos, plus ChromeCast Audio, 2 complete audio systems with discrete amps. Software is Volumio, LMS, Foobar2000, HQPlayer, Audirvana. Amazon Music HD is only service I pay for (cheap). I can do multi-room, send high-bitrate streams over a robust wifi network (a single 4x4 MIMO Ubiquiti). The rest is streaming FLAC Internet radio or from the local NAS via SMB shares to the apps, or my "DIY/RPI endpoints"
If you free yourself from the shackles of paid services, you might actually enjoy the hobby more. At least worth a try. It's not a matter of affordability, but one of principle.
Now....all this might be a bit obsessively engaging with the favorite hobby...while being happily married.
But still....why Roon?