An interest-only loan is a good way for someone with credit to get into a loan. The interest-only loan puts 100% of the interest up front, with no principle coverage until the contracted interest is up. So, without financing, you would pay for about 3 years before even touching the principle. With a normal loan, you have the interest / principle ratios that start off very low (Like 10% princ, 90% interest, in a good case) and then the ratio slowly moves towards a 90% principle ratio.
The end cost is the same - The bank will give poor credit or risk buyers the interest-only option because if they default, they want maximum loan coverage, plus your house in the end. Which means that in 4 years if you default on the loan, they take the house back and make 100% on the house value, plus they banked your past 4 or so years payments as profits.
How about you calm down before posting from now on ?