Next time have them call a locksmith.

Selling agent needs to take care of this or the deal is offIf the tenant changed the lock without written authorization and the tenant was given proper notice for inspection, the PM can legally show up with a locksmith and open the door....as long as a decent lease is in place....which given the situation, there may not beSo you had an "appointment" and neither real estate agent showed up?

Out of the blue no warning...no other discussion...I didn't have a spare key because my ex property manager took them all ( don't ask) so called my locksmith ...I was really holding my breath as to what I might find...but the house was clean and in order and as far as I could tell no damage...so yay...I can rent it out again no problem...it was just so strange he would do that...he has not made any other contact with me...never had this happen before

Changing all locks with kwikset re-key kit to fit two keys a master and tenant key, different than the smart key locks.

Get a good locksmith or re-key company to help you out with the new locks.

Usually I would have the locksmith meet them during the walk through to change the locks and get new keys.Any repairs I would call the repair person after reading reviews on yelp or google or use someone my friend recommended.

I knew they owed me $806 balance after rekeying locks and a maintenance expense was deducted. 

Yes, go rekey unit, they have vacated.

The seller took a picture of the door and called a locksmith to reinforce it, but locksmith didn’t get there before the door was broken and the property was entered illegally.

If I win the auction and get deed to the property, I don't know if there's a point in filing an eviction notice since no one lives there so the question is, do I just wait the 30 days as required by law and have a locksmith change the locks?