For economics/statistics/CS, I think you may be using the representativeness heuristic - there's a lot of variation even among people with slightly different brains. I'm reminded of a radio interview I listened to with a woman who had a photographic memory, who had a job as an antiques dealer or something similarly boring. I thought "man, I would totally use that power for good, rather than.. antiques dealing." But no, many people will grow up and be extremely... ordinary, even if their brains are slightly different. Anyhow, I think you'll find that 20% is quite a large increase over the base rate - I was being conservative.
As for unemployed people being willing to move to DC... 10% is a total guess, but it's vaguely based off of unemployed recent college graduates I know. I'm not sure what normal labor mobility actually looks like, though.
Freddie Mac, a mega-mortgage company, is offering "2-3 internships for recent college graduates on the autism spectrum with backgrounds in statistics, mathematics, economics, computer science or information technology" in D.C.
Given the job market, the demographics of LW and the difficulty many autistics have finding employment I thought this worth posting.