Seller Financing - Rehab Refinance

[Reyna Lopez]

Hello, 

I'm a total newbie trying to figure out the funding portion. I have a property that the owner is willing to seller finance, it is a vacant property that needs plenty of rehab. The owner really likes the idea of having a steady income that seller financing can offer him. I'd like to take a loan for the rehab portion (or I can fund through HELOC). If I do either of those options (loan or HELOC) how can I refinance and get that money back once I force appreciation after the rehab? I'd need to stay with the seller finance, since that is what the owner is interested in. Is there a way to refinance just the rehab portion....? How would that work?

Thanks in advance!