Have you considered 3D modeling for games or film?
Plenty of need for good training instructors there as well.
Paul Pepera: https://www.artstation.com/search?q=pepera
Tor Frick: https://www.artstation.com/search?q=frick
Vitaly Bulgarov: https://www.artstation.com/search?q=Vitaly%20bulgarov
Fausto Di Martini: Fausto De Martini