There is very little in the residential side unless you own your own business. On the commercial side, there are a fair number of jobs which may be available, but it is more about knowing commercial gear and being able to get sales deals closed. The problem we definitely see in our business is that the sales leads are all out there, but our sales staff doesn't know how to put together a proper commercial system, and completely fails to talk to anyone about gear which sucks vs. gear which is good, so they just specify junk (at times) and leave it for a tech to deal with never knowing the problems.
You would want to look up, check out, and start calling commercial places, and expect a fair bit of being paid on commission to get things started. If you are good, it will all pay off, but you have to expect a lot of long work days to get to that point. Lots of homework.