Reasonable labor charge for replacing engine wire harness? Non shop labor

What is your question?

I have had an ongoing problem with the engine cutting out, losing spark and just plain dying while driving! There was an oil leak which dripped onto the engine wire harness. It comes wrapped in some kind of fabric tape which wicked the oil right up into the junction box next to the fuse block under the hood and from there also into the PCM. Replaced that twice. Mechanic says wiring harness needs to be replaced. Reasonable charge (labor only) for a non-shop affiliated mechanic to do this? At this point there are no codes except for 12 (battery was disconnected last 50 starts) and 55 (end test). Problem occurs every time it is driven for the last year and a half, replaced Cam sensor, Crank sensor, fuel pump, PCM (2x) cat & 1 o2 sensor, bypassed one fuse in passenger compartment, purge can sol replaced, full clean on throttle body, IAC motor & solenoid, and that kajigger that returns the burnt fuel to somewhere. It will also stop when idling. Not stall, just plain STOP.