I can see properties where I know all of the title issues up front, I know what the inside looks like, I don't have to sweat out an auction or hire locksmiths and eviction companies.  

This way we can easily set new pins for new tenants, don't have to call locksmiths, can create pins for handymen/cleaners, etc2.

A call to a locksmith should have been enough not to mention the PM should have had another key. 

I’ve never spent (wasted) money on a locksmith between every tenant

A locksmith is less available and charges $60. 

@Nancy ZhaoIf you are the legal owner, and nobody is living in the house, call a locksmith to change the lock and secure the building ASAP, before someone get in there.The car could be simply from a neighbor, parking for free over there.Talk to a neighbor if you can to find out what is going on.

My Dad was an ice cream man and locksmith among other things.

Saves on locksmith labor.

If they do accept it then have a locksmith on standby........that's what I've done.

@Tina Lee good suggestion by @Nathan G. if you are DIY and have less than 20-30 or so doors.Unfortunately, the system he suggests gets cumbersome to manage at a certain scale.We've been using locksmiths for ages and here is how they do a master system:MASTER KEY- can have as many SFR doors you want under the master-MUTLI-FAMILY: can then add another layer of submasters, so you have a key that only opens every door in the building---Great for apartment type buildings where tenants often have a key for building entrance and another for unit entrance.