You can have it forward to your cell phone, and either have it display the phone number calling you, or the Google Voice number itself, so you can automatically know that it is someone calling about the house.Nothing is absolute in real estate and no two deals are alike.

If it's a text or voicemail, call your cell phone company and have her blocked as a potential inbound caller.

I can set and delete user codes anywhere I have a cell or wifi connection.

You only fill in one cell (either B40, C40 or D40) and the spreadsheet will normalize everything for you.  

The second one is when Morgan and John helped you with your facebook account (it's not stated here in the email but Im sure you remember calling Morgan's personal cell and her logging into your facebook and doing the work for you.) https://d.pr/i/H7x2qb.

You might try a hunter's camera:http://www.trailcampro.com/howtocatchathief.aspxAnother mechanism I like is a Tagg dog tracker (GPS devices) in the desirable equipment, like appliances, so you can track your fridge long after it has left the house.  

Foolishly installed a smart oil gauge to track oil usage and predict spikes due to windows open or other tenant bad behavior... before realizing I don't control their WiFi and don't have cell coverage in basement to link to a cellular hotspot (oops). 

My bank does a similar calculation when calculating rental income (75% of rent counts towards income).You get a few other benefitsTax advantages: purchases you need for your rental business (e.g internet and cell phone) can be expensed which means you pay with pretax money (or get a 25% discount)Principal pay down.

I’m a young medical device salesperson living in Jackson, TN.

Don't fool yourself into thinking you rubbed 2 brain cells together to create that money and know how to recover spent principle.