Ebooks are one of my favorite sources of passive income. Now, you can do this the simple way and just publish it on Amazon's KDP. Or, you can go all out and build yourself a book funnel. Book funnels are powerful, but they won't be fully passive. For example, if you do a free-plus-shipping offer for your ebook (converting it into a physical book), you'll need to create some one-time offers (i.e. extra training) and up-sells (i.e. an audiobook). But, a book funnel can be very powerful.
Leveraging the internet to create, connect, and sell is something every creative person should attempt to do. The only risk is lost time and a wounded ego. You can start a site like mine for as little as $2.95 a month with Bluehost and go from there. They give you a free domain name for a year. Forget all the add-ons. Not a day goes by that I’m not grateful for my site.
Residual income is the amount of personal income left after an individual has paid his bills and periodic mortgage payment (expressed on a monthly basis). Residual income is an important consideration for a lender; if a loan applicant shows a large amount of residual income remaining each month, this means the person's current income level is more likely to support the payments associated with an additional loan. Conversely, a minimal amount of residual income is likely to trigger an immediate rejection of a loan application. Residual income tends to increase dramatically later in life, after a person's mortgage has been paid off.