Active job

Install locks on gates. Requires some welding

Change the three gates to fire gates (egress locks) so that one standard key is required to gain entrance to all three gates, but a one action latch or button is required to exit. There needs to be a metal barrier of some kind to prevent someone reaching around from the outside to gain entry to the premises. This metal barrier might be a steel sheet or it might be a cut off piece of steel pipe.