How to obtain a line of Credit when Lenders want 1st position?

[Jason Smith]

Over the last few years I have been using flipping as a primary way of raising capital for my buy and holds.  Using this strategy I have built my holdings to over 200 k in equity.   I would like to start leveraging that and putting it to work.  The issue I keep running into is that lenders want to be in 1st position. Meaning they will not allow me to use my equity to obtain a line of credit.   

I would rather not do a HELOC on each property due to the associated closing costs with each loan.

What can I do in order to tap into this equity and put it to work for me?  Are there any lenders that will take a 2nd position?  Who are they?