Thank you for sharing your article! You did a great job saving and putting your money to work for you. Like you, I share the same financial dream of having 150-200k in passive income and traveling the world stress-free! :) Right now I’m saving about 80-90% of my active income and put it toward ETF funds and value growth stocks because I’m seeking capital appreciation. And I can tolerate a lot of risks because I’m still in my early 20’s. By the time I reach 30 something I’ll start looking into blue chips stocks that pay dividends and REIT. So I want to be where you are by that time lol. Anyways, that the plan and I’m sticking to it. Good luck on achieving your financial dream!

Department C has earned $142.5 million residual income as compared to $40 million earned by department P. Residual income allows us to compare the dollar amount of residual income earned by different departments. Since the residual income in both cases is positive, we conclude that both have met the minimum return requirements. However, with residual income is not easy to compare performance.

One of the most appealing options, particularly for millennials, would be #12 on your list (create a Blog/Youtube channel). The videos can be about anything that interests you, from your daily makeup routine (with affiliate links to the products you use), recipes (what you eat each day) or as you mention, instructional videos (again with affiliate links to the products you use). Once you gain a large following and viewership, you can earn via Adsense on YouTube.
When money is lent to a partnership or S-corporation acting as a pass-through entity (essentially a business that is designed to reduce the effects of double taxation) by that entity’s owner, the interest income on that loan to the portfolio income can qualify as passive income. As the IRS language reads: "Certain self-charged interest income or deductions may be treated as passive activity gross income or passive activity deductions if the loan proceeds are used in a passive activity."
If you're looking to get started in real estate, look at a crowd funding solution like RealtyMogul. It works similar to LendingClub - you commit as little as $5,000 towards a property. When the property is fully funded, you become an owner, and will receive your share of the earnings and appreciation in the property.  Check out RealtyMogul to learn more.