I came across Dave Ramsey's TMMO back in 2006 and it changed my life. My wife and I paid off $27K in about seven months. By the time she gave birth to our first child 9 months later, we had saved an additional $15K and she was able to stay home with our daughter. Now, 7 years later, she still stays home with our two kids. We were able to do that because we followed Dave's advice, although not to the letter. We simply needed to learn how to be financially disciplined. We still use debt, but sparingly. If we want something that we can't afford to pay cash for then we find the best deal, finance at the lowest rate, and pay it off as fast as possible. We never finance more than one big ticket item at a time.
Now, I am completely comfortable with the concept of using other people's money to build wealth because I know that I am responsible enough to manage it properly. If I had to save my own money before getting into real estate then it would take far longer to do it and the returns that I would lose in the years that it would take to get to a point that I could afford it would be huge. Even worse, I may lose interest in real estate during that time. Good luck with your decision.