My kid uses tutoring services through his college. They are unlimited and free and they are specific to the class. You just go online to the tutoring section of the website and enter the class you need the tutoring in the. You get a list of availability. Biggest issue is making the appointments early enough around the due date of big assignments.

No but used office hours a couple of times

Yes, in Calc 3 (but it was taken as a freshman, so kid felt nervous about testing into it rather than starting lower) and lined up an orgo tutor but did not need it.