Re: re-wiring a trailer
Does your trailer have brakes with the round 7 prong connector or does it just have the lights with the flat 4 connector?
First, if it is the flat 4 connector, I would really suggest rewiring the trailer yourself. It is very straight forward and running the wires isn't hard at all.
Second, if it is the 7 prong round connector, I'd still try it myself but research it quite a bit to ensure the brakes work properly.
Third, if you are having a shop do it, I would say no more than 2 hours labor maximum (realistically maybe an hour and a half). Also find out what the parts will run you there. I'm sure the mark up is incredible. You might save yourself a good chunk of $ supplying the parts yourself and just paying the shop for the labor.