Long Term Rental Door Locks

[Tyler Kidd]

Question: 

I own a property management company and my team is about 5 hours away from a new 50 door complex. 

I am looking for a temporary door lock to put on the vacant units to allow a remote showing after the background has been cleared. The complex doesn't currently have wifi so the usual suspects of smart locks don't work. 

Does anyone know of a lock that may work, something similar to a supra key but for consumers? 

Thanks In Advance!