I would say $450-$600 if he has to install all of the weatherstripping and felts to the trim. Plus if something gets scrathed he will need to pay for that.Does this include the vent windows as well or is the truck a little earlier in years? I just did all of mine in the last month and spent hours and hours trying to get everything just right. Are you supplying him all the staples, rivets and urethane to hole glass in the track/channels too? It can be very time consuming. You may be able to get it done cheaper at any old glass shop but they will not take the time to insure it's show quality.