1. Typical salaries start from 31k to 45k
2. Yes, non-profit does not pay well, and for-profit is in the range already stated, and yes, some pay more than others, not a lot more. It's in your performance.
3. Top earners make a wide range; experience and longevity is key. 150, to 250. it is not typical, and you will spend at least three years getting to the 100k mark. it's a sales related job; and I mean it.
4. Sales training and related subjects that can inspire a student to take action and enroll.
I can help you in the area of training, but of course, it's not free.