Probably not battery operated but hard wired.

Also, in the documents mailed to me, there was an escrow breakdown and they are charger me (the buyer) a bankruptcy surcharge to the Bankruptcy estate of the seller.

Electronic Lifts- disconnect the battery if leavingfor long term storage.K.

You could offer seller financing and charge rent for the new owners who will most likely want to keep the mobile home on your lot if it’s nice enough.

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. 

This is different than a roommate situation, where all three tenants sign one lease and move and out together.Rent by the room is a way to maximize rental income, because generally speaking the total of room rents exceeds what you would charge renting the whole property as one unit. 

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.