I'm not sure if this is just the right time to be thinking of this or just the wrong time. Real Estate Schools that is. With the market in trouble you might think that it's not a good time to be training to do appraosal, home inspections and so on. However, you can also look at it and say that many people will be put off, but there'll still be a need for people to do this work: so it is still possible that there will be a shortage of people.
A slightly difficult calculation. But do have a look at the directory of Real Estate Schools to help you with such a decision: more information is obviously good.