There are hundreds, if not thousands, of websites offering users the ability to get paid for taking surveys online. Same as with Cashback sites, if you encounter a survey site where sign up if not free, simply avoid it. I have not checked it myself, but a few online entrepreneurs suggest trying toluna.com. Also, you might want to try Cash Crate - In addition to getting paid for taking surveys, they offer cachbacks and other quick online income perks.
Lending Club went public in 2014 and is now worth about $1.7B. They advertise P2P lending returns of over 7% for well-diversified portfolios of over 100 notes. I’ve personally been able to achieve a 7.4% annual return over the past two years in a completely passive way by investing in A and AA notes. Others have achieved a 10% annual return through relatively minimum effort. https://i.ytimg.com/vi/gOikEE3Xibw/maxresdefault.jpg
Let’s continue the vintage BMW idea. Old cars obviously require quite a lot of maintenance. Many people will buy a “fixer upper” with the intention of spending their spare time repairing and restoring it. There’s a very obvious market here: a guide to restoring different BMW models. Depending on your knowledge, you could produce detailed guides for the three or four most popular models and sell them. Not everyone restoring a car will buy them, but some probably will.
When I purchase an existing online business, I look for cash flow over the past year and where the money comes from. I want the sources to be more passive so that it does not take a lot of my time. Also, typically I will make an offer that is 18 – 24 months of profit so that I know that I will get my money back within the next two years. I hope that helps!
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.
Before you buy any property, an inspection by a professional and independent home inspector is essential. Even if your potential purchase has just undergone a beautiful renovation, you must find out if the wiring and plumbing are all up to code. In most areas, it’s illegal to operate a rental property with any code violations. A top-quality inspector will be able to estimate the remaining life of the roof, HVAC system, and hot water supply, as well as find any defects in the structure, such as dry-rot in the attic.
Like I mentioned earlier, coming in late in the game can be an advantage if you listen, learn and provide solutions for what seems to be missing. Even coming into a market with a minimal viable product, you’ll have the advantage of being able to get deep into the customer experience to shape your product or service to what it should be, again, all based on what you’re able to measure and learn.
You also get to see specific details about each loan, including what the borrower is using it for, the state they live in, how long the pay-off period is, what the monthly payments are, and what rate the borrower will pay. It helps you get a better picture of what type of risk you’re exposing yourself to, and you get to take more control over your investment.

All ideas take some amount of time and money to come to fruition. Some people have a lot of one of these, but not much of the other. A lot of successful ideas have started when one person had the resources that another did not. And many businesses have been started using 0% loans from credit cards to fund their concept and keep the business going until it achieved success.
“I don’t believe the overnight success exists. There’s a lot of hard work and time involved beforehand,” say Flynn. Angry Birds may have seemed like an overnight success but it was the 52nd game that Rovio created. Flynn says it took him a year or year and a half to build audiences for his most successful sites. (Read these time management expert's tips on the work habits of successful people.)
If you have specialized knowledge in a certain topic, you can put together an online course to teach others. For example, if you have experience in real estate investing, you can create an online course “Real Estate Investing 101”. The benefit of an online course is that once you create the course material, you can sell it to as many people as you want. 
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