To ensure you’re not overpaying, compare these quotes to typical rates in the area using resources like HomeAdvisor or Thumbtack, or by reaching out to local contractors for ballpark estimates.

They have a group of funding sources that will compete against each other, this helps keep the final interest rate within reason, and offer a partial refund if they are unable to secure financing. 

Demand is very high, both for rentals as well as for sale and this is probably not going to change.

This is something that can easily be changed later if needed.

I don't really want to invest in a D-class area.Tangentially, what are some of your "it's time to sell this property" red lines when it comes to the changing economic conditions of an area? 

what happened to me is all the good rate bonds are snatched up before we could get them.

All of these things change over time. 

@Tom Rairdon If you’ve owned your short-term rental (STR) for over a year, it likely qualifies for long-term capital gains (LTCG) treatment, taxed at lower rates (0%-20%) compared to your 33% ordinary income bracket.

What I mean is, some investors look strictly at cash on cash return, some look at cap rate, others just want to make sure their mortgage is covered.

If you have a good understanding of your market, asset class, risk profile, etc. this ratio can change accordingly.