First property but struggling to close the deal!

[Luis Caracosa]

Hi BP team, 

I have been working a deal and I have convinced the seller to accept creative finance.  Seller is willing to keep the loan under their name for two years with a small down payment.  My dilemma is that I'm not sure if I should use a lease option, wrap or subject-to.   Likewise, I don't know how to execute the administrative paperwork.  Anyone versed with this unorthodox style of purchase?  Any advice/coaching will be greatly appreciated.  

Thank you in advance for your time.

Luis