The infomercials make it sound too easy - I watched one the other night where most claims were 50-60,000 homes were being snapped up for 2-500, or 200,000 homes for 5,000 whatever the price it just seemed outlandish and laughable. Especially since most of the testimonies were from people who had never done this kind of work before.
In the real world it's quite complex even if just buying a home for yourself. You can save quite a lot of money though there are factors, from investigating the property, down to the owners living there now. They could very well peacefully leave, however after you buy you could get some vindictive owners that could cause trouble.