How to Maximize this owner finance deal

[Zachary Smith]

I have a property where the owner owes 30K, it needs around 50K in repairs and the owner would be willing to carry back the note for 0%. My plan is to use private money to get the work done in under 8 weeks, and then refi. My question comes in at the refi part- is there a creative manner to refinance so that I pay the lender back their 50K (plus interest) but still benefit from the 0% interest - or is the best bet to borrow enough monies to pay for the purchase and Reno?