Here, you make a loan to say a rehabber and use the note as the collateral on a personal loan someone makes to you at a lower interest rate.

I offered a free and clear duplex as collateral.

We have 3 properties rented and are currently finsihing up a fourth to either sell or refinance and rent so i also neeed to see how i can leverage my other properties for collateral on this multifamily if that's possible.

Some require additional collateral some don't.

What do you bring to the table (experience, cash, other collateral, high wage w-2 job, big IRA/401K balance, etc)? 

Depending on your long term financing objectives you could also think about HELOC which is a cheap ready source of cash but won't let you borrow as much and will have variable but cheap rates, or collateral based loan which may have higher rates and short terms.  

The assets that would be used to qualify would need to be personal assets beyond the property itself as collateral?

I am trying to determine the extent of the guarantee needed and how best to structure the guaranty to include the additional stores as collateral.

I'm assuming you had a pretty solid job before and I either got to a point where you have essentially no debt, a spouse who makes more than enough to pay whatever bills you do have, or have a strong networth that you can use as collateral even if you don't have any form of passive income coming in.

Did you pledge SF rentals as collateral?