Are you wanting to put songs in wav or flaac Format or something? I feel like a decently size used iPod wouldn’t be a whole lot more than $100 and 100 GB could hold 10,000 songs in high-quality 320 kB/s or so.
It sounds like you’re trying to build an iPod classic with Bluetooth
I DJ weddings for about 10 years and literally had my entire entire DJ library backed up on one
Seems like a lot of words just to say that running servers (I mean instances) is too expensive to be self sustaining. I’m not smart enough to know if that’s true or not.