I have been doing this investing thing for a few years now and have listened to almost all of the podcasts. They are a wealth of information and experience. Everyone has different situations and experiences, and you have to just take the parts that apply to you and your unique situation. I have grown to appreciate the doom and gloom because it teaches me the most important part, which is how to keep my butt out of trouble. I've learned so much from other people's struggles.
I wanted to add that I have 2 investment properties and both have been no money down. I bought an 8-plex on a contract for deed 2 years ago with no money down, 5%, and $850 per month. I actually left the closing with a check for property taxes that were due that year! He recently had gotten out of the low income housing program and rents were not getting fully paid. I turned it around quickly. As soon as I had a good cash flow, I was able to get a bank loan. My second property is the flip that I'm currently working on. I got a great deal on it, provided the bank with a list of what I was going to do with it, and they gave me the loan, plus remodeling costs.
Everyone's situation is different, but the podcasts have given me SO much courage to ask for things that I never would have thought possible. Good luck :)