There aren't a lot of moving parts in them and usually few electronics.

I no longer accept checks, only take electronic funds like Zelle or Venmo The checks in the mail routine cost you money and creates bad landlord/tenant relationships.

You can manage the Air bnb remotely with an electronic key pad lockbox, or hire a property manager who can do it for you.

@Trevor ScheidererI talked to over a dozen banks and credit union and each one was confused by my scenario, I finally talked to a broker at Guild Mortgage and she said she could make it work IF i had all the payment recorded electronically to prove my story.

This will not only give you the paper trail, but also give them a receipt.Also, for your electronic payments, try Zelle instead of venmo. 

Where can I find a service that allows me to send contracts where the seller can electronically sign?

Docusign for electronic signing has been a game changer for us also 

Also, you cannot make electronic payments from the HELOC only checks.Regardless, I'm happy I have it. 

We always post them on the front door as well as send something electronically.

When I sent out my introductory letter and questionnaire she indicated she preferred electronic payment so I set up what she requested.