OK, here's one for the community at large:
Suppose you have a customer hire you to come shoot a portrait of them. The customer is highly eccentric and insists that you allow him to purchase all gear used for the shoot. He gives you an equipment allowance of $3,000. What would you tell him to buy. Remember that the only thing you can bring to the shoot are your skills as a photographer, and you can't keep the equipment when you are done.
How would you change your equipment list if it were some other type of shoot (Landscape, Wedding, etc.)?