Work through the whole module and take 3-4 full practice tests.

Try to get a maintenance report as you would do for your HVAC system.Does the system have Batteries?

This is what I do   So far so good Battery operated Fake security cameras,  With blinking red light  1 on each corner.  

They are battery operated, you may have seen them in restrooms. 

But he did leave a LOT of neat gardening tools, a battery charger, gas lawn mower, outdoor patio furniture, 5yr old propane BBQ so our new tenants were real happy.

It looks like a "ring base station" is required to make these work, not sure if there is a work around, and also wondering if you'd need your own dedicated wifi in the house to connect all this too Owning a few properties myself and as a property manager for other investors I am imagining now the calls I would be getting when this system isn't working properly, batteries die, motorized lock stops working etc, so living in new england with the elements and temperatures we experience I would not recommend this to the owners of the properties I manage I have an up down style 2 family with a common entry door that sounds very similar to your setup.

Article highlights:“Tesla recently purchased 381 acres adjacent to its existing 2,100-acre site at Harold Green Road and Texas 130, deed records show.Tesla also is believed to be pursuing additional land purchases in Southeast Austin along the Texas 130 corridor, according to local real estate developers knowledgeable about the area.A battery-making operation also could be a possibility, as well as a test-driving area, analysts have said.

If they do start manufacturing their own batteries it would be a big move. 

The “test battery” button only test the battery.

Can you reset a malfunctioning modulator/demodulator?