Everyone has their own motivation for becoming a law enforcement instructor. For me, I love nothing more than hearing from students about how they have used their new found knowledge to put bad guys in jail or they used the information to keep themselves and their partners safe. One thing you won't become, though, is rich. If you are in it for the money, you should turn around now. Very few law enforcement instructors go on to make decent money teaching. To get there, you do a lot of teaching for free. What it can do, though, is give you personal satisfaction and it can boost your career.