Even if each patron only contributes a very small amount each month, it can still be a huge source of income. Take a look at the Patreon page for Kinda Funny, an internet video company. They have over 6,209 patrons which means an average of just $3 a month would be a monthly income of almost $19,000 – plus they get cheerleaders that are always happy to spread the word on their brand.
But, you don't need to go further than that. You can simply write it and publish it and collect the income. That's all. Send out a couple emails to your list (if you have one) or post it on social media, and there you have it. Passive income. Now, the amount of income you receive depends on the quality of the book you've written. How well did you craft the message? How targeted was the information to your audience? It counts.

The popularity of Internet combined with several apps on smart phones, tablets and the PCs, the world is experiencing boom in a new segment which is eBooks. It really does not matter if you are writing fiction or nonfiction; you are an experienced author or a first time writer there is a room for everyone and there is an audience for every kind of eBook.
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.

Ebooks, which can be published through sites like Amazon Kindle Direct Publishing, are an increasingly popular option. Because these books are self-published, the process is quicker, allowing you to build residual income faster than the traditional publishing route. Whether it’s a romance novel or a how-to book on fly fishing, you can create a book and have it available for purchase in a matter of weeks.

Try going to our post: 20 Sites That Will Pay You to Read Books: https://wellkeptwallet.com/get-paid-to-read-books/. Even though editing is not what this post is about, there are several companies that might do book editing such as Kirkus: https://www.kirkusreviews.com/editing-services/get-started/marketing/?utm_source=google&utm_medium=cpc&utm_term=%2Bbook%20%2Bediting&utm_campaign=Editorial-ES I hope this helps and good luck on your book!
Residual income is the amount of net income generated in excess of the minimum rate of return. Residual income concepts have been used in a number of contexts, including as a measurement of internal corporate performance whereby a company's management team evaluates the return generated relative to the company's minimum required return. Alternatively, in personal finance, residual income is the level of income that an individual has after the deduction of all personal debts and expenses have been paid.