Keep everything to code (smoke detectors, windows and doors, etc). 

The motion sensors at the floor make the door open, not close.

Also, I think there is a lot of emotions involved so try to have a conversation with your wife 1st before you start moving things into motion.

Hey Will,As a PM in the area:-have a lawyer look over your lease-make sure EVERYTHING is in your lease (who replaces air filters, who replaces smoke detectors batteries, who cuts grass)-be thorough with background inspections-make sure tenant is aware (and is in lease) on when fines occur for late rent and how much they areThose are things that first come to mind.In can be expensive and time consuming to set it all up the first time and do it in a way that protects yourself and your investment.Let me know if I can help in any way!

Many times you need to be there for them while they go through the motions of trying to keep.

Experts say the pandemic is less the cause of the decline in luxury rents and more an accelerant of forces already in motion in L.A.’s economy.

Unless a motion to substitute purchaser was filed and granted, then the high bidder is still the purchaser in the eyes of the law/court. 

You can use changing smoke detector batteries or changing furnace filters as the reason to enter the property.

Put in nicer appliances, some modern tech tools such as smart detectors and thermostats.

Treated for bugs, replaced the interior and exterior "Zinsco" Breaker and service panels ($10,500), remodeled 2 bathrooms, replaced 3 of 5 water heaters, smoke detectors, added kitchen and bathroom GFCIs, 1 AC unit, 1 new dryer, replaced 2 windows, repaired several more windows.