Polo season is gearing up in your area. While polo may not even make your list of interests, the horse community there is quite interwoven. Horsemen in one discipline know horsemen in other disciplines.
If you can just get "in" to a barn, you can let your goals be known and if you show a good work ethic and even a little willingness to learn how to do your duties well, a recommendation from one of the players or barn managers can go a long way in helping you find your dream position. (phew, that was a long sentence!)