Many individuals may be seriously overestimating how much money they need to start investing in passive income properties. It is true that it may require millions for some to retire. However, as Harvard Business has recently reported; if investors focus more acutely on income versus nest egg size, they may achieve more with less. This is specifically true for those that intelligently use leverage. In real estate, for example, you can quickly scale to controlling millions of dollars in property, and their cash flows.
Owning property can earn you passive income for decades to come. Once you purchase a duplex, home, or apartment building as a rental property, you’ll earn a consistent monthly income with little work. Rent should cover your mortgage, taxes, repairs, and other expenses. You’ll continue to earn income by paying off your mortgage with the rent money and saving excess rental income.

In equity valuation, residual income represents an economic earnings stream and valuation method for estimating the intrinsic value of a company's common stock. The residual income valuation model values a company as the sum of book value and the present value of expected future residual income. Residual income attempts to measure economic profit, which is the profit remaining after the deduction of opportunity costs for all sources of capital.