Is 20% down required for a rental property?

[Victoria Elazigue]

Hi everyone! I am just starting out and interested in learning how to invest in real estate. I currently live in the Bay Area and have some money to invest but am priced out of this market so my next option is to invest out of state. The reason I am looking at Vegas as a good market for me: short flight from CA, the Raiders move and the exodus of Californians. I would like to get my foot in the door by investing in a rental property in the Vegas market but my first question is if I have enough money to get started. I have spoken to a few loan agents and they have advise that banks typically require 20% down for financing on a rental property. Is this always the case? Hoping someone can provide some advice on how to finance a rental property with as little down. 

Thanks in advance!