If the tenants are completely uncooperative, I would just give them notice that I will be entering to do work and I would have a locksmith get you in and have the locks replaced at that time.

If you really want her out, I'd tell her if she leave before the end of this month and the place is in good condition, that you will return her deposit AFTER she is out, given you the keys and you've inspected the place...and as Colleen says, be there with a locksmith or new set of locks to change the locks.Then once she's out, you can try going after her in small claims court for the unpaid rent.

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

Hello Ryan, these are some of the kinds of tasks I am thinking about for Boots on the Ground.Lockbox installationKey duplication, meeting locksmiths, digital lock code changesMeeting cleaners, landscapers, tradespeopleProperty walk-throughs via phone and/or video conferencingMove-in and move-out inspectionsPlacing signage on propertiesPhotos and videosScheduling contractors and tradespeople for vacant propertiesStatus reports on contractor/tradespeople progressProperty drive by

I took over the management of our portfolio while living overseas, and found one of the most challenging pieces of management was finding someone to do an easy task (photos, move-out inspections, meeting a locksmith, etc.).

How did you know she had a locksmith drill through the locks?

I'm asked by the sheriff to be at the property at a certain time with a locksmith.

Called a locksmith and gained access.

Utilities, lawn mowing, locksmith, etc. 

Eventually got a locksmith out around 2am after one ghosted me.