No, I don't think self hosting is the solution. I still remember the times when every label had its own little online shop for mp3s. Those were dark times: not only did you have to register at every shop separately, most of those shops where just plain unusable: no pre-listening, broken id3 tags, downloading each song from an album separately, charging extra for higher quality, no accompanying artwork, etc. As I've already written: I think Bandcamp does it very well, and IMHO it is currently the best shop for indie musicians to sell their music online.