Its gonna be $$$$$. Wiring is tedious and takes time. An entire new harness wired in...gosh - I would guesstimate at least a days work for a mechanic...so 8 hours multiplied by whatever they charge hourly (Mechanics here in Phx charge $70-75 an hour...so if it were local to Phx, I would say somewhere around 600-900, depending on how much time they need.
You should shop around and ask a bunch of places. Get quotes from all of them. If you have a male (a friend, dad, boyfriend, husband, whatever) that can call around for you...do it. Mechanic shops are more likely to give honest prices to men, than women.
GL