The product itself may have been defective as one service person said this is the third module of this type that is leaking this year.

For example I had a soft start module installed this spring on our A/C unit to extend it's life.

one thing I have heard about the keyless locks is that those with the servo that slides the bolt back are subject to battery drain and when the battery gets low, the lock will not open since there is not enough power to slide the bolt.So, Joel Owens you might check that out for your mom -- would hate for her to get locked out due to battery drain (granted they should still open with the key...) -- just throwing that out there.

Tenant said it’s an old battery operated detector.

You may want to consider a spring/fall schedule to better prepare for the major changes in seasons (air filter replacement, cleaning gutters, pruning trees, changing smoke detector batteries, etc.)

They are WiFi enabled battery backup and locked and unlocked with a smart phone.

My thought , put concrete foundation (so unit can be financed) and place module homes down or even container homes down.

Before you make any big life decisions maybe take a leave of absence from work for 2 or 3 months and recharge your batteries. 

Establish what their responsibility is: ie. smoke detector batteries, light bulbs, flipping breakers, etc.

KC just nabbed a 4,000 job Panasonic battery plan in the metro that will be built in coming years.