URGENT Wholesale question

[Kris Kempe]

Hey BP family, 

I'm currently trying to help out a family in need from having to foreclose on there property by taking over subject to, 

it has a high interest rate although the entry is around 20k I want to wholesale this ultimately 

Is it possible for me, to disregard my initial assignment fee to get a buyer asap and add a 2nd lien on the property as my fee?  So whenever the buyer wants to refinance or sell the property my lien comes up aswell and that's when I'm taken care of? is that possible, if so how?