I recently bought my first rental property, it is just a little manufactured home down in Yuma Arizona.

When we built up the triplex, we set it up so that each of the 11 rooms can be rented out individually (all BR, except 2, have their own bathroom behind an electronically locked door).

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

I think smaller markets say sub 50k population would have a larger impact from one big move from a manufacturing facility or something like a Amazon processing center.

There's also a good amount of manufacturing hubs here.

You then put it on the wall to sense the paint color, and it sends the color to your phone - adjacent to the manufacturer's color that most closely matches the wall color.

But, for instance, I sent them a notice of rent increase effective February 1 and needed them to confirm that they have accepted the new payment terms through our electronic payment system, and even after repeated notices, they are not responding.

Not to say that you'd pick crappy materials, but contractors with experience have manufacturers and suppliers that they know guarantee their products and that helps them know they can stand behind their work. 

My main account has all the rents deposited and all expenses deducted such as mortgages, some utilities and an electronic payment app connected to the account to pay contractors.

The obligation to mediate, unless otherwise agreed, will terminate if the entire dispute is not resolved within thirty days of the date written notice requesting mediation is delivered by one party to the other at that party’s last known address (physical or electronic as provided in § 26).