If you decide to target LE as your market, remember that we generally have our own in-house instructors for most things, but occasionally "real experts" are brought in for "train the trainer" stuff and/ or to train tac guys. For instance, my agency has about a dozen instructors in the cadre, but we have Frank Proctor come in quarterly to teach/ instruct for the tac team.
I am one of our instructors, and I can tell you from experience, getting into some of the gun games will absolutely make you a better shooter, and instructor too. Good luck.