owner financing until repair is completed

[Chris Vair]

Hi,

Quick question: I am looking at a property to flip. After rehab the sale price should be about $225K give or take. The place currently is built in 1900 and has a brick and mortar foundation that needs extensive repair. The owners are selling is FSBO for $150K. They have stated that they can't sell it because it won't pass an inspection until the foundation is fixed. My question is this: I am wondering if I should pursue seller financing so that I can have the cash necessary to fix the foundation and rehab the property. If so, what would be a typical down payment for a scenario like this? I need it to be less than 20% so that I have the capital to fix the foundation.

I'll also take other thoughts too if you would like to add anything.  

thanks!