I just went and looked up the Bentley logo, and that is going to be a lot of work. Will you be providing a solid model of the part? Just to get you going, figure 4-6 hours to model, 4-6 hours to program, 1-2 hours for soft jaw design/programming/machining, and anywhere between 1 hour and 4 hours of setup and machine time depending on detail required.
Is someone really willing to pay that much for a custom dog tag? If yes, I'm in.
You might also want to give an idea of overall size.