I don't provide a physical key but try to have two backups in case the battery dies or the lock malfunctions.

What if appliance really malfunctions for no fault of tenant due to age of appliance?

Of course roots, or malfunctions are my problem.

I mean I do understand if there is negligence or something like a a malfunctioning boiler which pushed temps to 120 degrees, but many places have no AC.

When we bought the property about 20% of the meters were clearly malfunctioning, and showing zero water usage or near zero. 

If one system malfunctions, you'll be out of the water.

We run a 53 acre ranch in the middle of Texas, and the stress of unexpected problems coming up with not enough time to resolve them (septic, water lines, other equipment malfunctions, adequate pool maintenance) between guests is too great.I'm aware there's money left on the table.

I like the lock but there was an A/C vent right next to the door and we had condensation issues with the locks getting wet inside and malfunctioning.

I mentioned it to my husband today and glad we have back up keys to open the doors in case the electronic system malfunctions.

We found other two new violations (Not changing air filter causing AC to malfunction and we had to replace it) and (Not Maintaining yard).Is it ok to update the lease violation notices and resend eviction?