As an extreme example, there's a UBS ETN with the ticker MORL that tracks a global mortgage REIT index. It offers 2x leverage. It currently has a 20%+ yield and distributions are paid monthly. Is there risk? Sure. But unlike a house, you can exit your position with a few keystrokes.
The great thing about investing in real estate through securities like this is that when the market slows or changes trend, you can sit on the sidelines or go short.