CAD is quite useful. While I can’t address the overall market, I’ll comment on something I’ve noticed. Houston, where I live, has long been a fruitful market for CAD operators, with oil companies being a large part of that market.
When CAD finally became entrenched, in the late '80s, we thought it was great. A lot of the Leroy and rapidograph folks didn’t make the switch, and they’re just about gone, now. Chartpak tape and airbrushed output were effectively completely replaced by digital presentation materials.
But we haven’t outsourced to a CAD shop in about five years. That’s because our workstation work product output can easily be presentation material quality, so we now generate a sales package ourselves. The thought is that it would take me as much time and effort to prepare something for a CAD shop as it would for me to just generate it myself.
Along the same lines, my niece is an architect. I’ve gathered from her that nobody gets an architecture degree anymore without being able to use AutoCAD. But, I think their stuff still does get worked over by a CAD department.
I seek not to dissuade you. Not at all.
I’m thinking of a good friend of mine who’s been an AutoCAD operator since DOS days. Last year he was laid off by the oil company he’d worked for for about a decade. It may be partially due to the phenomenon I noted regarding oil and gas prospect generators producing their own final output a lot more these days, but D’s been having trouble finding work, here in the city that usually dodges economic slowdowns.
It may also have something to do with the fact that after almost twenty years of doing CAD work for oil and gas companies and environmental consulting companies, D doesn’t know squat about geology.
Learn some complimentary ancillary skills along with acquiring CAD proficiency. Be able to tell that the electrical circuit you’ve been given has a flaw, or that the contours on the map show a that a critical fault has no throw. I’ll throw in another, an independent CAD/GIS guy I’ve worked with who’s in Mississippi. While I met him through oil biz dealings, one of his bigger contracts during the time we conversed involved setting up a “smart” map for 911 services in rural parts of Mississippi. He threw himself into a project that almost nobody really knew anything about. He learned a lot and became vital to the continued progress of the project.
Judging by the lives lead by the few CAD operators I know, you can make a good living if you master it.
Good luck!