Pastel painting done from picture

A2 size painting of an ancient chinese emperor on horse.
Medium used: Soft Pastel on paper.
Client's purpose: Personal Collection.

Apart from portrait & caricature art, I paint all sorts of stuff from clients' request. Usually they would provide me with a picture & ask me to paint accordingly into a large piece of work. This service has no standard pricing as it depends on how complicated the work involved is. I would estimate how much time do I need to complete it before quotation is given.