Rachel takes a small number of commissions each year. Most often it is a portrait for one particular person, or a large floral scaled to one particular wall.
Tell her the size, the room, and who it is for. She will come back with a direction, a timeline and a price before anything begins. Half up front, half on completion.
Each commission is priced on its own terms: the size, the surface, and what the piece actually asks for.

Exhibitions, publishing, editorial, murals, and projects with teams who need original work rather than something off a shelf. Rachel takes on a few of these a year and considers each on its own merits.
If you are building something and think the work belongs in it, say what it is. She answers either way.