You might also consider changing their due date to later in the month going forward. 

If the unit is empty, change the locks, clean it, and get it rented.

When the time changes we sometimes move that call to Friday evening, so depending on when time change is this year, we may be able to make the November investors meeting.Thanks again for reaching out - I'm so happy to find someone in Maui to connect with regarding investment opportunities.Aloha,Barb

It's wise to stick your toe in the water first and fail fast in a small way if you're going to fail, right Vanessa?

The mortgage payment still has not changed 7 months later even though this was cancelled.

I have listened to the BiggerPockets podcast for sometime now but have never taken any action, hoping to change that very soon.

(This may have changed in subsequent funds, so check with PPR.) 

Quote from @Treza Edwards: I would be looking at this as a market-dependent change.

That's probably changed. 

They moved in and within 24 hours sent the following letter (names have been changed): "Hi Dawn and Brian,Sindy and I are frustrated, disappointed, and really struggling with the idea of moving forward with the move into your home.We realize this is the first time you have rented a property to someone, and may not be aware of the responsibilities that landlords have, and want to inform you that there are habitability issues with the home that are quite literally against the law, pursuant to Colorado’s Warranty of Habitability Law, CRS §§ 38-12-501 et seq.