...let's just say I hope you get kissed.
You can get a prodigy for $106 with free shipping from the very nice folks at www.rjays.com.
There's four wires to connect. And two screws to mount it to your vehicle.
The only, only deal here might be if you have zero trailer wiring right now, and they're gonna run the battery charge lead and fuse everything and so on.
But if their standard shop rate is $60, that's roughly an hour per wire. I've installed trailer wiring, power door locks, alarms, remote trunk pops, and a zillion stereos, and an hour a wire is just nuts.