how to option for wholesale deal

I have a home the seller will sell to me for 5k. I have all the information needed to buy the note from the person who holds the auction note.I have many possible wholesale buyers.What is the best way to do the deal,option to purchase?Looking for help on this deal. The house is 165k after rehab can purchase for 115k rehab 20k Allan Boike

Is this really a deal? 70% of 165k is $115500 - 20K fix-up means $95,500 or lower would be a deal. Did I miss something?