Subject to Exit Strategy

[Q. Daniel Elder]

I am a new realtor & wholesaler and I have a client ( my grandfather) who wants to purchase a home that is headed for auction in a month. He can afford to bring the mortgage current with his savings but can't afford to pay cash for the home and wanted to get a VA loan. How could I protect his risk just in case his loan doesn't go through but he's already paid the sellers mortgage to current? I was thinking of doing a subject-to deal but would he be able to refinance? Help!