As ane example, Nest has all sorts of devices that can be linked to one account. 

I am selling a 3/1 with side porch and washer/dryer/storage room, just off the Sligh and I275 exit, behind the Post Office on Nebraska Ave. 6710 N.

Would it be better to rent it out as storage space?

Oh, sorry about that, @Patti Robertson .Do you access the site through a mobile device?

One leveling foot was missing, and one was damaged, apparently from the previous owner moving the unit into storage.

You may want to expand your investment horizon as well outside direct rental investment, for example examine MF syndications, MHP,storage, debt funds, non-RE , music royalty deals,etc, sometimes there are more deals in that sectors.negative cash flow in an increasing interest-rate environment is not worth to purse. 

It's the only proof of income they provided us, period.If they made $50,000 since February, I still wouldn't accept a screen shot from a mobile device as evidence.

self storage units?

If you don't provide a lock, just put something in the lease that says if they use the storage building to store items, they are required to install their own lock. 

@Chris SeveneyWhen others suggested devices to track temperature, I immediately start searching wireless thermostats.