It's probably how you're explaining what you want at the banks.

I am confused how giving it back to the bank, foreclosure or bankruptcy is a necessary direction of consideration here given these numbers. 

Have an LLC or S Corp- Holding company w/own bank account.

The templated contracts will vary by jurisdiction - but you'll also probably want to spend the time to have an attorney or experienced professional look over your template to ensure you are protected in the way you want.

I have excellent credit, but I am seriously considering returning the property to the bank and damaging my credit for years to come.

We bought them as loans from banks, got the properties back from the very delinquent borrowers, stabilized them, and sold them to REITs.

We're looking at an STR in a jurisdiction with a cap on STR permits, which are not transferrable on change of property ownership.

(a) Each sprinkler system required under this section shall:        (1) be installed in accordance with accepted engineering practices that meet the standard for the installation of sprinkler systems in residential occupancies under the regulations of the State Fire Prevention Commission or the local authority with jurisdiction over the enforcement of fire and building codes;        (2) meet the requirements of the current National Fire Protection Association standards; and        (3) be approved by the State Fire Marshal or the local authority with jurisdiction over the enforcement of fire codes.   

I have one with a community bank. 

although you'll want to check with your local jurisdictions to be sure.