A question of what work to take on

Greetings. This is a rather different kind of question. I will start by acknowledging that I do book “repair” as a hobby for myself and for the Head Start Preschool where we (usually) read once a week and the little darlings love their books to death – literally, sometimes. But I have taken on several other projects that I feel I can handle, always doing them either for free or for a modest donation that I can take to the local food bank. So….I’m not in any way obligated nor do I offer a “quote” per se. I have recently start “cleaning up” a bible that had substantial opportunities for improvement. While I have not encountered anything I can’t handle, there were a significant number of dog-eared pages; I have literally “touched” 350+ pages, more to come, looking at 1139 or so total numbered pages. Not difficult, but a bit tedious, but I will finish what I started. Here’s the question: Have you ever, as a professional, looked at a book, know in your mind what it needs, but just don’t want to go there regardless of the payment? See pic. Not all this bad, as this is probably the worst of it. Thanks for your insight.