I know typically battery backup is used when the grid goes out but not sure if I'm able to pull from battery to avoid tripping any circuit breakers in the main house. 

One nice feature with Minut is that its battery powered, which means that you can place it _anywhere_, on a wall, ceiling, etc.

Are you able to change batteries on technology like Ring devices, Smart Locks,smoke detectors, etc.?

You can do silly repairs yourself… like figuring out the batteries in the thermostat are why the AC won’t turn on; that it was a tripped circuit breaker even though they swear they checked them.  

Mortgage: $2,634Utilities: $300Misc: $300Total: $3,234The misc. is things like toilet paper, paper towels, coffee, sugar, linens, batteries for remotes, laundry detergent, soap, etc., etc.

And if there's a dog, charge them increased rent, cause you're gonna need it to recondition the yard after they're gone. 

Tons of trash left in the home and in the garage along with personal possessions - toiletries in bathroom, decrepit looking washer and dryer in basement (not hooked up and seemingly long unused ), old couch, old truck tires, vehicle battery, TV stand, mower and vac in garage. 

Another more expensive option is to have a keypad with multiple pins, that would cost more to setup and batteries would need to be changed too.Let me know what you do, thanks!

But it will cover battery-storage technology (up to a certain capacity).

Making tenants feel safe (motion detector lights, fire ext in unit, peep holes in door, smoke detectors with battery back up in all BR's and hallway, renovated baths, extra storage and off street parking all help tenants feel cared for, safe and secure.)