I had learned a lot working with previous illustrator, who shall remain nameless for the sake of courtesy. Most of what I learned working with him were lessons in getting what you pay for. His work was good, but his timeliness and ultimately his professionalism left much to be desired.
Like many artists, he’d “always wanted to illustrate a book,” but had never done so and didn’t understand how much time that took. I also didn’t understand the ins and outs of this process.
So given the lack of experience on both our ends, we were pretty naïve in our agreement. He agreed to a rate that was below market for the sake of experience, and having this in his portfolio and on his resume.