Securing private lender's position

[Lowell Ash]

Does anyone have EXPERIENCE with borrowing from multiple private lenders and securing their interest in the properties that you purchase? I'm looking for a way to give them security in a property that I purchase without naming them as a lien holder on that specific property. The idea is to have them secured each time I buy and then flip a property, but I want to avoid the time-consuming process of naming them on the property, then getting a lien release when I sell the property, only to turn around a do it again on the next property. I'm thinking there must be a way to give them a blanket security interest in any/all properties that I purchase for flipping.