What would it be at a shop
Start to finish, custom wiring.
Depends on the labor rate, so lets go this way.....
So you got about 250' of wire +/-...figure about .50c/ft. $125
you're gonna need terminals, lets call it 40 terminals at $1 ea. $40
wire ties and loom tape, call it another $20. $20
I would say a day of labor, let's call it 8 hrs. at $75/hr. (it's $90 up here) $600
$185 in materials, dont forget the taxes call it $15 = $200+ labor(600)= $800
Sooo $800, give or take, you can buy te harnesses for a little over $100.
Money potentially saved by DIY= $650, That's a lot of money for spare parts.
GT