Would like to comment on the OT but interesting discussion between ScottA and grypho...
Both gentlemen want your son to take the best career decision. It is a merit to them both that they came forward to defend their position.
The critical question is " Do I have the talent?". If yes, go for it. If no, let reality kick in. We all had dreams of becoming an astronaut, a successfull "Indiana Jones" archeologist, a famous sportsman. In the end this ususally is not the outcome.
Make sure that the career decision you make gives you enough money to make a living and that you like the job. After all, most of your life will be spend by doing your profession.
I am an engineer and my job decision was based on economical grounds, because in 1985 Europe had a big recession. I now have enough money to do 3D as a hobby. I sincererly am dubious if I could make the same money as an artist (I am actually very certain:)