Depending on the amount of work that you've completed, you might have an option. 

If no, then thats a non-starter.2) But it brings you to the next benefit. 

There is no other mortgage or other liens that I can see on the property.

There is a banner on the top that states "Listing cannot be published without a Zillow Advertising Contract," I filled it out but have gotten no email confirmation or estimated time of completion. 

The rental property is entirely funded by the HELOC with interest rate of 3.6% (10 year withdrawal, 20 year repayment) and no mortgage on it. 

Unfortunately it does not work that way.  

My goal is to generate cash flow, no knowledge on how to increase the NOI, no experience in house flipping, just some cash from inheritance.

I work with lots of investors and it's rare they get a discount. 

Keep in mind, that is NET income, so with enough operating expenses, and depreciation, you might wipe out any income, and thus no UBIT, you will just need to run your numbers.

I actually worked with a client in Phoenix not too long ago who was in a similar boat...trying to transfer their loan to a buyer looking to use the property as a primary residence.