We have a family member willing to loan X at 0% + our equity for the purchase of a home for our primary residence. Property in our neighborhood is some of the most expensive in the country. We therefore would need to borrow Y as a hard money/bridge loan to afford anything. In this situation, given that the primary loan isn't a gift, can we fund the delta with hard money for 3-6 months, then refi out the bridge debt into a conventional/agency loan? Alternatively, how could we make up the gap?