In your neck of the woods I would say $150 give or take. then there is the cost of installing the hitch. Call around and get some quotes form places that sell trailers. I might be way off. I have not had one done in over 20 years. I do my own now. It is not hard to do.
Need more info. What model truck? Does it have towing package installed? If so, very easy and inexpensive to install brake controller. I have '05 Silverado and it took 30 min and cost about $50 for the controller. The controllers vary from about $50-$100 depending on how fancy you want to go. I pull a 32 foot travel trailer with my truck.
Wiring a up hitch is as easy, plug in deal now that you can buy those harnesses that plug right into the factory wiring harness on most any truck built since the 70's at any trailer place or parts store,even WalMart has them I think..
Hooking up a brake controller isn't too complicated either,I'd do it myself ,I have put in a few many years back,and I didn't have any trouble,just read and folowed the directions..I think many newer trucks have a harness for one already there left unused if no factory towing package was installed,if I remember right..