I’ve done exactly that with both Plex and Roon. Roon is more expensive but delivers a more complete user experience as well as better sound quality at home.
A lifetime Roon license costs <$1000, so in the same general cost ballpark as many popular home audio streamers and less than most audiophile gear in people’s homes. It’s a good investment for any home hifi and music enthusiast.
Plex is better at remote streaming than Roon so Plex makes sense for a cost effective solution using everyday consumer computing devices that can do it all including good quality remote streaming via CarPlay, headphones, etc