You have asked a great question! I agree with the previous comments left by Suzanne and Dan. I know exactly where to find the types of homes you are looking for. In the investor community we refer to these as "Owner-Finance" homes. Through my extensive marketing campaign and lead generation I typically come across 1-3 owner finance deals per month in the Austin area.
The owner finance deals I have closed have downpayments ranging between $18,000-$100,000 depending on the value of the home and the needs of the seller although the average is right at $20,000. That includes my fee, and my company makes this a very hassle free experience for you. I also know of many other ways to get into homes with even LESS money than that. Feel free to contact me and we can set up a meeting to discuss this in further detail.