My brother is nearly a mechanical engineer, how can he make money online?

He has about five subjects left of a five year degree in mechanical engineering. Practically a licensed engineer.

And he needs to make some money soon to fix his car engine!

So I come to you asking for any ideas of what jobs and sites (e.g. oDesk.com) could he work at, that could value his price per hour because of his technical specialization?

Any ideas will be great! Thanks :)