No. I use a series of computer apps to create these images. I value and want to acknowledge the idea that I'm producing "original" artworks. Additionally, I set limited editions for many of my renditions.
Often, my reply is, "...tens of hours," which is accurate in most cases.
I wish this one was asked more often because its history goes back to nearly a century. Much of the answer can be found in my Senior Thesis, which I've redacted, here.
YES! I welcome commissions and encourage you to show me any images you think might be potential projects for me. In response, I will write a brief reply, stating my own personal thoughts on its feasibility, cost, etc.
From experience, I have found that prototype images with clear subjects, heavy contrast and little blurriness tend to work the best.