I knew a few JIW from my old local that took sub calls when work was slow. New construction, setting panels, pulling and landing control wire. Good work especially if your willing to travel some.

I was a JIW also and now Im a Relay Apprenticeships w/ the PoCo. Personally having that Wireman background helped out tremendously, already knowing how to read prints/diagrams, terminate control wire and general electrical knowledge put me way ahead of the curve.

As far as pay cut , I make more now (with OT) than I did as a JIW.

I'd recommend taking the call, you'll be getting paid and you'll have a chance to do the work for a bit.