I agree with the others about saving your money and reading as much as possible in forums of various websites. Youtube videos are a good source too.
Where you might need to spend money is on a website with a squeeze page, business cards, bandit signs and membership in your local REIA club.
Of course running ads in Craigslist is a great source for sellers.
My Craigslist hint....
It must be that people in default can't sleep, because I get most of my squeeze page responses, from my Craigslist ad, at 4:00 AM. Post an ad late in the evening. I post in Real Estate for Sale, Real Estate Wanted, Real Estate Services and Financial Services.