For example, first link below is a 2 yr old home, approx 1900 sf, in central Tokyo's Minato Ward. 

Purchased for $139,999 using a mix of cash and hard money, we revamped it with modern updates, including a new kitchen, flooring, and fresh paint.The property rented for three years, generating steady cash flow of $450/month.

Quote from @Polat Caglayan: Can you give me a few examples of where and what kind of investments I should not make?

Example, a short pay history - non-redeeming factor, a 25% down payment, a redeeming factor to counter the short pay history.

As for the first, yes we'd be able to do that (for example, replacing a water heater which is the mechanical that's closest to the end of its useful life).

But there's something else that many people don't realize: these loans  "constant recast" during the interest-only period.For example, if I make an extra $400 payment one month, my interest-only payment will decrease the following month.

And that's a very simple example but you get the point. 

For example, population growth in certain neighborhoods and increased investor activity have created opportunities for both long-term rentals and value-add deals.If you’re torn between wholesaling and holding long-term rentals, I’d suggest thinking about your long-term goals.

Example 1: Buy property for 1.4M.

For example, if they need a quick sale, emphasize your ability to close fast.