I don't think I have the ability to refund any position of the deposit electronically. 

We spent about $9,500 on furnishings including furniture, electronics, kitchenware, bedding, towels, etc. for our 2/2 condos.For market pricing, I collect LTR data from BP rent calculator and multiply by 1.5x.

It isn't oral, its written and also electronic.

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.

So, several years ago I switched to a basic electronic deadbolt paired with a plain doorknob (with no lock).

They sent me an electronic invoice from locksmith.

I prefer tenants pay using electronic ACH transfers through apartments.com and in those cases payment is considered made when they initiate the transfer even though I don't receive the money for days afterwards.

Many landlords now use online platforms that integrate electronic signature capabilities to handle this legally and efficiently.

The electronics package is very sensitive to fluctuations in electrical supply. 

Ours were not electronic, they would fill them out at the property if they were interested, or drop them by later.