Saying that "I buy houses for cash"

[Teresa DelaMater]

I've seen examples of direct mail marketing and bandit signs that say, "I BUY HOUSES FOR CASH" and "CLOSE QUICKLY." I'd like to have that ability, but I don't have a big pile of cash myself. What specifically should I do to make those true statements? Is it okay to advertise that if my only way of fulfilling that promise is to hope that I can wholesale it to someone else who does have the money sitting around? Or are there loans that I could obtain very quickly that would allow me to purchase a property for "cash?" I just don't want to advertise something if I don't have a way to follow through with it.