It has something against it (aka collateral), especially as I have 30%+ equity in all my properties which should - barring the end of the world - enable me to get rid of all debt if need be .

Use a deed-of-trust that pledges the property as collateral for the loan.

Offering them a first position lien on your current portfolio as collateral.

Hard Money lenders really don’t look at credit like traditional lenders because the loan is based on the value of the property that serves as collateral.

Where does the equity actually go and what is used for collateral? 

A private lender that would  be willing to refinance her at 80% so she could then acquire another property, might do this if they could be in 1st position on both properties to collateralize their money.  

The concept isn't that much different than bank financing.In bank financing, the bank creates a promissory note and collateralizes it with a mortgage. 

Values approx 50k each -450k in totalI have perfect credit, great assets (300k+ cash) and very good income (both rentals and w2)I would like a line of credit 250k (60% loan to value)  using 9 properties as collateral I would use the 250k line of credit + my 300k+ cash to purchase fix and flip deals and/or lend hardmoney Does anyone have a contact to suggest for such line of credit?

However, a recent investor demanded to know all kinds of information about the project such as: where all of our other financing was coming from, wanted a copy of the title, a copy of the rehab estimate, appraisal, and wanted collateral.  

So I thought harder on this issue and decided it would be very difficult to secure funding for any decent amount without any collateral.