Wholesale a county owned property, double close?

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Hey guys, 

So I have a list of county owned properties that are going to auction via sealed bid auction, with 5% of the bid amount due along with the purchase agreement. They require that you use their purchase agreement, that has no assignment clause in it obviously. I've analyzed the deal and know my MAO , my plan is to wholesale the property but am not sure how i can do so without putting up my own money first . I'm fine with putting up the deposit money. I just don't know how the process works with a double close, how would I set this deal up so I'm not coming out of pocket and still making my wholesale fee?

Thanks