Outside of specialty items, such as light fixtures, whoever buys the materials installs the materials. If you included $500 to go to the race track what difference is it to the customer? You made it clear what work would be done for what price. If you do the job for labor only make sure you tell them it is for actual labor hours. Include travel time, time shopping for materials they didn't get and stand around and bulls**t with them hours.
Good luck Russell
bob
