You wouldn't be putting him down, you'd be being realistic. It sounds like he dreams big, as a PP said. Nothing wrong with dreams, but the sorts of dreams your DH is dreaming take a long, long time and a lot of hard work to achieve, and you're competing with hundreds, even thousands of other people who want the same dream job.
I'm sure most people at some stage dream of having a job where they love going to work. For some people, it just can't happen.
I'd say he should figure out a bit more of a vague area he wants to get into, research it, do it as a hobby and try to work his way up.
You mentioned being in a pit crew. Would he be interested in becoming a mechanic? That's a lot easier to get into.
This post has been edited by erindiv: 05/01/2013, 10:30 PM