Duplex listing in C(-) area in CA. Hard Money or all Cash only

[Adriana Good]

Hi BP!

This is my first post discussion and I have a question about how you go about these 'Hard Money or All Cash" deals. I saw a duplex for sale but the listing states hard money or all cash with a quick close. I don't have the cash to pay the full amount, just the 20% down payment. How do I go about (strategies) getting a loan for such properties that call for cash/hard money and what should you do as far as due diligence or steps to take before even getting a loan? Do I approach the listing agent and ask for a walk-through of the house to check the condition of the houses? Any input is much appreciated. 

Thanks in advance! 

Adriana