Do we need forensic pricing?

[Debra Jones]

I just got a message from a potential client that wants me to sketch their Great-grandmother.... FROM MEMORIES. There are no existing photos.

Now my iniitial gut instinct is the big zero. But I started thinking about taking a photo of, say, her mother and adjusting.

Many of my clients will say about other family members "just look at my eyes, they are the same" etc.

If I had a shot of mom and worked it up with the adjustments in photoshop etc, I may come up with a passing likeness....

So what would you think the pricing on such a thing might be?
Of course I would charge a non-refundable down equal to the combat pay it would require, but what might you figure the final cost percentage increase would justify such a thing? I doubt they want more than a charcoal as she said sketch.