Regarding crime. Your ideas are great but my experience dictates that nothing will be followed as you have offered. In many U.S. cities, both large and small, the law officers take their marked vehicles home and use them for errands and personal use. Just think what a police car in the parking lot at the supermarket could mean, let alone at home.
I decided not to come to Costa Rica to live because of crime and price increases. Does the government really want expats and investment?