I have done this with students, and I expect most tutors have, but it's not a common request. In my experience (so, this is anecdotal rather than scientific), the students who get more done in a structured tutoring or classroom environment are not the types who would follow a study plan on their own, so the people most likely to seek out a tutor are those less likely to want an independent plan. Conversely, those who like to follow a plan independently are less likely to seek out a tutor (for anything!) in the first place.