How can I finance this billboard property with commercial space?

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So, I found the opportunity to buy or rent a small patch of land on PCH in Huntington Beach that includes a billboard.

After doing some research, there's no way that the ad revenue the billboard would bring in wouldn't cover the mortgage.

I want to buy the property but don't have the money for a down payment. 

What are some ways that I can purchase the property?

Or would it be better to rent and bring in money from the billboard that way? Would I even be able to while renting?

Thanks in advance for any input!