I am new to real estate but I have been generating leads through my marketing and my website.  

@Gina CresseYou can also use solo 401k funds to invest in real estate if you are self-employed.

One idea that you can try that won't cost you any money to generate duplex leads (other than your time = money) is to call on rental ads where one of the units is vacant and being advertised.  

Hi everyoneFirst let me say that I love the forum and I'm new here.I have years of experience when it comes to designing websites and generating online traffic for different niches.

I think its great that people are thinking of over ways of generating an income other than the traditional 9-5 methods.  

@Valentine SernaIn order to take a loan from his 401k, your associate would still need to be employed with the company that holds the 401k plan.

@Trevon PeraccaI personally do not use a lot of SEO or lead generating websites, however I have seen their power in action before.

If your area is desirable (trendy, or maybe a new employer brought more jobs to the area, close to a college, etc...)? 

With the $53K downpayment we were willing to drop, a 30 year fixed mortgage, and typical rents in the area, the property would generate a positive cashflow of about $500 a month (about 11% ROI - unheard of for San Diego)!

I am not certain based on what you have written if you have employed this tactic yet, if you have not, this can be a very easy way to achieve your goals.