Whelp, it's taken a lot longer than I would have liked but I'm finally managing to take the time out to move the whole family's music from Spotify subscriptions to mp3s on a self hosted mpd instance. It's a lot easier to hook into things like OpenHab as well; while nothing is a reliable means of getting a teenager out of bed, programmatically escalating light and #progrock volume levels are the best we've found so far.
And we get to both save money and support artists more directly; although we like music it isn't like we buy an album+ a month at the moment. #music