I even read in one of the previous discussions that there is a way to obtain numbers from all renters in my area code and send them a short voice recording at a reasonable fee, although I'm not sure how to do it.

The deep voice that narrates is great hah. 

My agent called the buyer agent and left a voice mail but we have not heard anything.

She complained to me she heard voices in the house and was wondering if someone died...so I wouldn't be surprised if she wants to move out due to being afraid the house is possessed.....Saying this because I wouldnt have an issue paying for the ozone rental but dont want to do it if she will end up moving out anyways...

That evil voice  in my head keeps saying - "the worst is yet to come". sometimes I don' trust it.Two parts question- 1.)

This is your business, so operate just As a Property manager would, create a google voice # act as though you’re the PM.

Don't let it go to voice mail.

I have a P.O. box set up and listed on the lease as well as a Google voice number and a separate email.

Have you guys used text or ringless voice mail? 

Just a phone number using Google voice and a dummy email address.