Interest-Free Hard Money as Needed Proof for SPECULATIVE Deals?

[Jonathan Vince]

Does such a thing exist?

You need proof of funds to bid at an auction, but there's no guarantee you'll end up with any of the home/s you want to bid on. Does anyone know of a creative arrangement between Hard Money Lenders and borrowers such that the borrower can use the lender's funds as "proof," and then only pay the interest on the loan if he ends up using that money on a winning bid? To put it into an imaginary scenario: 

On auction day I need to show a cashier's check for the property I hope to acquire. After having done my due diligence, I know this property will have a lot of equity, provided I get it at a price no higher than my max bid, which is $465K. With my own money and with private money, I have enough to cover 20% of that total plus the amount that it would cost in interest to pay a Hard Money Lender for up to a year. The HML agrees to very temporarily "put up" the remaining 80% ($372K) WITHOUT charging interest (via some official agreement that ensures I can't just walk away with his money), and a day or two before the auction, some kind of transfer occurs such that I can now pool all the funds together and print up a cashier's check to use as my proof of funds at an auction (whether pooled in my account, or his account, or an escrow account, or some other account?) . . .

If I don't end up with the property, then the lender gets his money back. If I do get the property, then he starts getting payments on his loan. 

I could see this being attractive to a HML, especially if the borrower is someone he has already worked with and trusts.