There are many ways to do this, if a person doesn't have money and wants organic targeted traffic you have to put in the work and build it with the right tools and tactics. At the core it is as with all marketing about finding traffic streams, and directing them to you. Creating your own audience is a long term strategy. People who don't have money need to think high leverage long term. Money makes things go faster, smarts and patients is what it takes to succeed without the first.