Tom:
Yes, looking forward to hanging up the tools (for whatever reason) is a good reason to obtain inspector credentials.
Here in NJ the 3rd party guys work for a State approved company, and are hourly/salary/per diem employees. All of us inspectors are state lic., and answer to the DCA, no matter who pays our salary.
Certain jobsites (rail stations, toll roads, state property) require permits and inspections by State DCA. Plan review for certain school projects and health care facilities are performed by DCA, but inspected by 'locals'.
As to elevator inspectors...the majority of the State uses either an agency, or the State DCA. Amusement rides are state also.
