There is allot to this.
Its illegal to put locks on bedroom doors as well.
each student may require there own mail boxes.
you may need to install a bell and intercom system
you may need to provide a fire escape on the building.
you may need to insatll more then one entrance.
you may need to install hardwired carbons and smokes
There is alot to this go to the buildings Dept. and speak to the Zoneing officer and the head inspector.
609 392 0225