well lets look at it historically,
granted you bought your home at the bottom of market you would have gained approximately 250% interest or a little under. And say you buy a 160,000 dollar home at bottom of market and charge 1500 a month rent that is another 144,000 in income over 8 years. so 390 plus 144 minus original investment of 160 = 374,000 dollars return on a 160,000 dollar investment that is 233% return for 8 years. Or 29% a year return. Now it's about half of that because you may need to liquidate to have a home to live in and can't cash out. If this is a second or third home then that is not the case. Now that is a good return in perfect situations. Lets compare that to index funds and stock market. The market went up 10% this year, and if you were in a triple leveraged fund you would have made 50% this year in (UPRO). So you can make more in the stock market, and can make money any year and in any economic situation. Houses not so much, it could take 1-5 years to hit the bottom of the housing market to enter responsibly. That is roughly 100% loss of return compared to if you were in a leveraged fund, and monitoring it. I don't recommend people use leverage, or do investments on borrowed money, or on money they can't afford to lose. But you cannot beat the returns if you know what you are doing.