Door Knocking is the king of FREE Marketing for Real Estate Investors that do not have cash. Use your time to cash-out with sweat-equity in America with Door knocking on sellers houses. The number one reason why I love door knocking is because there is no LINE, so it means the fishing pound is empty and you will have higher probability to get a deal as most real estate investors are scared of it. For all the champs here this is your chance to pull yourself ahead of the herd.