I understand that I need to either rekey the house or change the locks out completely.

Would it be appropriate for me to rekey or is it illegal? 

A yes-or-no questionIn this place known for its breakneck expansion and the new nickname “Silicon Desert,” eviction is its own thriving economy.Evictions make work for attorneys, for locksmiths, for self-storage centers, for moving companies and for government staff.

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.

Have them send you the invoice from the locksmith, then call the locksmith and see what the full story is.

Simplify as many standard processes such as online rent payment, leases, apartment turns, paint, and other materials, and re-key all locks to a master system.

They rekey my property without telling me.

We've had zero phone calls answered or returned, multiple promises or calls "tomorrow" to talk through issues unmetAt this point we've hired another PM (Sadly MidSouth Homebuyers, whom we have other properties with and have had nothing but excellent experience, wouldn't manage this location) who is now going through re-keying the property and assessing the state of the rehab.This was a test property for us, so we learned what we wanted to learn on this transaction.

We purchased a property, signed contract for a 45-day SoW (cosmetic rehab, add AC) and after about 30 days it's been radio silence.We have been pretty patient and now at 60-days past closing we've engaged another local PM who is going to be re-keying, assessing rehab status and taking over from here.I think similar to OP there's nothing particularly nefarious or shady going on here, but the follow-through and ability to land a deal is significantly lacking with this team.

They installed bidets without my permission and created plumbing issues so I had to pay for a plumber to come out several times, I've had to replace a frontdoor knob and deadbolt last month even after we rekeyed the home prior to them moving in, the garbage disposal blades were jammed so had to call a handyman, repaired a broken window which my property manager claims was broken prior to them moving in even though the repair was made 3 months after they moved in.