It varies, depending on the piece. If I’m drawing a single person or subject, then it usually takes me around 40 hours, sometimes less. If I’m drawing a larger item, with two or more subjects, it can take weeks or months. It all depends on the complexity of the piece. I can usually gauge the length of time a drawing will take, based on the source material I’m drawing from.
Due to my ongoing health issues, I’m no longer able to do these kinds of portraits.