Hmmm... I did this startup idea in '08. Counterintuitively, nobody wants to pay for something like this. I charged less than a dollar, (my compute was less than 3 seconds for a complete full body avatar, btw) and the quality was significantly higher than here. Check out what's left:
https://twitter.com/3DAvatarStore/media I had full bodies, extensive facial editing, Maya rigs, automated lip sync, hair/wigs and clothing, export in known game formats... you need to provide a shit ton of free, and then educate the end-user constantly because this type of tech attracts a lot of low tech consumers.