Look up the individual prices for all the components yourself. You'll find that one of the best tow bars runs on the high side $800, base plate $350, wiring $75, drop hitch (if needed) $100, braking system my choice Unified Tow Brake, $1200. No labor as I did it myself so it cost $3225 I'm not sure what labor would be but based on 8 hour of work at 125 per hour, that's another $1000. so we are looking at $4225.00. I'd say your cost is within the ball park.
__________________
|