I haven't done this in many years, but I had the prewire done to my specification (this was not an elaborate system), I shipped the equipment, and flew out to do the final install and setup. I stayed in a room at the house and the customer provided meals. Obviously, we were on good terms. My guy (down to earth, self made) was a golfer, the house was at the seventh green of a well known course, and a world class pro had a house across the street. It was his dream come true. One night we went for a tour of the area and dinner at the clubhouse (custom diet for my customer) to "show me how the rich people lived". Other meals were takeout because the kitchen wasn't fully functional yet.