Utilizing private money lenders

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I recently found a property that I would like to rehab and sell. However, I can't finance it myself and I am in search of a PML. My questions to the BP community are: do you have to put money down (if so, how much?) and how can I persuade a PML to lend their hard earned money to me?  

I'm new to investing and this could be my first deal. Any tips or suggestions would be greatly appreciated. 

Thank you, 

Krystal