I'd be happy to chat over the phone and help strategize if you're interested. 

Perhaps hire a property manager to handle the phone calls and factor in the (depreciable) window, kitchen, HVAC costs?

It's helped me to actually turn off my phone at night and not dread calls in the middle of the night when guests forgot their code.We not only reply to messages but take actions like setting locks, checking your calendar for availability, contacting repairmen directly, etc.Here's a recent reply for an early check-in reply in my personal account.https://ibb.co/gv0tY16 (early check-in reply after checking calendar.

It won’t be a 1 minute phone call with nothing other than a disgruntled tenant to reverse the charge.

THe calls are forwarded to my cell phone and I can then move them in or assist them via remote log in to my office computer.  

We would try every phone number on the work order, including the dispatcher; messaging in the portal, which seems to be their preferred line of communication, and emails.

You are easily able to talk to Nader of the phone or his team.

If you just want to calculate a mortgage payment that’s a free function of 10’s of not 100’s of free apps for your phone/tablet.

How many people answered the phone?

If they still give you a hard time, (not sure why they would make no sense) turn on your phone and record it.