Hi, in my late 30s, early forties, I became aware that there was such a thing as Asperger's Syndrome and thought it was pretty neat. Not until age 43 did I become pretty convinced that I myself am on the spectrum.
Jobs are a problem and in a way, your son is factually correct to be concerned. Also socially, if you're living at home, a person may be treated as "weird" or not fully as an equal with age peers.
If my parents had understood that a person cannot simply will himself a job (and 8% unemployment is a big deal, or even 5%), that would have helped. In addition, for those of us on the spectrum, there's almost an inverse relationship between "easy" jobs and "hard" jobs. Entry level jobs are among the worse, disengaged managers who blame outcome and aren't really interested in the nuts and bolts of the work. Co-workers who can engaged in bullying out of boredom and who seek out differences.
I worked as a tax preparer for H&R Block. And I did try and do it ethically, matter-of-factly telling my clients the main negatives of the bank and loan products as if I was required to by the company. And the fact that I tried to do it ethically made it such a richer experience and I felt I was doing some good. Block and this other place, I was fired one year out of four, but that means 3 years out of 4, I wasn't fired and I will take those odds.
And we're moving into a world where more people understand Asperger's-Autism Spectrum and that makes a big difference. Almost like nerds are more popular, and people might claim to be a nerd even when they're not. Now, when people claim to have a "touch of Asperger's," I'm going to say that's more positive than negative. And perhaps part of the public dialogue we need to have.
Maybe your son is struggling with concurrent depression, too? (just that first anti-depressant may not work and it's trial and error in respectful sense. and sometimes important to step down from such medication in phases)
The good news is, your son might face a more open world than I have faced so far.
And I guess give your son considerable realms of privacy. It is hard living at home. That combined I guess with joint activities or projects.