I have one question - how in demand will these jobs be 10 years from now? 10 years after that?
Seems to me as the populations becomes more dependent on others, being a welders, pipe-fitters, electricians, carpenters, machinists and other skilled tradesmen will pay off. But at what point do we become like mexicans *in mexico* who know how to fix everything they need to live? Broken pipe? Dig it up and fix it. Broken car? Take it apart as least as much as possible and fix it. Need to build an extra room or two on your house? Pick up a hammer and some supplies and get to work.
I wish I weren't disabled - someone asked me the other day what is my dream job - living off the land with a few farm animals and growing crops for a family.
Numeric stability is probably not all that important when you're guessing.