应指纯收入。见原文。仍太低了。

如果房子不涨， 80 年才能收回投资。

The key is to figure out how much rental income the property will generate. A good rule of thumb: Make a deal only if you can collect at least 1.25% of the purchase price each year in rental income, says Jason Reed, a real-estate agent in St. Paul, Minn., who works exclusively with investors.