Hahaha...I hear you.
I was a residential construction contractor for forty years, and kept the same group of sub-contractors over those years, because they did their job well.
I typically had 10-12 employees at any one time, again the same group of people. I took one job at a time, or maybe two, if some of my men needed work. And we treated our clients like family, because they were letting us into their homes, and their lives.
My clients knew we would take care of them. If a previous client called me with an emergency, I would explain to my current client that I needed to help them, and that I would do the same for them if the need arose in the future. People understood, when I explained it that way.
For small jobs, if people couldn't afford what I had to charge if I took their job on the books, I would give the job to one of my guys, to do on the side.
In forty years, I never had someone's side job come back to bite me in the ass, and, as you said, quite a few of those customers came to me when they had big jobs to do.
I don't know MF Plastics, but I hope he can get his business, and his life, back on track, and I wish him good luck.