You're going to have to borrow the money, either from friends, family, investors or banks. You might even be able to get a combination financing, such as a seller held 2nd plus a loan from a bank.

If you don't have good credit, you can get a co-signer. Get someone with strong credit to co-sign for you, plus a combination of financing. You may have to give your co-signer a financial interest in the deal.

Another way to start out is to broker deals, or acquire an option on a property and then sell it to another investor. This gives you an opportunity to make money on the deal without having any capital involved. Research the term 'real estate options investing'.