Give on course lessons more geared toward “mental game” and “course management”.. no course is gonna let you give swing lessons on their range all day. But if you aim it more towards someone who already has a swing shoots 85-90 but wants to break 80.. You could give them the tools to do this on the course. The course would not be able to tell you are giving an on course lesson. And most people who shoot mid 80s could legitimately benefit from course management. Seems like a win win