I have never seen any rental property with keyless entry on the back patio door, but my tenant is asking for it.This is what I found out when I searched up TX requirement for rental properties-"Every rental unit in Texas should be equipped with the following security devices at the time that the tenant takes possession of the unit:One window latch on each exterior window in the dwelling;A doorknob lock or keyed deadbolt on each exterior door*;A keyless bolting device (i.e. a keyless deadbolt) on each exterior door**;A door viewer on each exterior door;A sliding door pin lock AND either a handle latch or a security bar on each exterior sliding glass door."

Will you give me your cell phone number or home number?

Those are filtering devices that only work in certain markets at certain times.People evaluated rentals and discovered a correlation between purchase price and rent rate to create a "rule" for quickly determining if a property is worth evaluating or whether it should be discarded.

I've read a lot about the many tax deductions you can write-off with investment properties (ie: depreciation, travel, cell phone, repairs, home office, property mngt to name a few).  

We've been happy with the service (tried a few similar services in years past that gave users with different devices various errors and complications, nice to see someone getting it right). 

Use Microsoft Onenote, you can create notebooks 9 maybe name it " Properties", in the notebook create a tab for each property, then you can have different pages for each tab, you can make one page " Receipts" for that property. you take a picture, save it to the page for whatever property in one note, with the APP on your phone. you can save them directly to that page, create Receipts pages for each property. and you can retrieve that information on any device that has Onenote. you can even name each page by the year if you want " receipts 2018" and you will always have your records anywhere you go.

I currently live in Connecticut and work as a medical device representative.

Something to keep in mind as well is most people that are not tech savy as soon as "something" goes wrong with their devices they will blame it on "the internet" or "the WiFi".I would not advise going this route unless you have some experience in IT and don't mind supporting it.

They may have a cell phone but that's all they use it for is phone calls and maybe pictures. 

They have multiple points of contact and I outlined them for them in cell, emergency cell, email and home address.