I have a friend who's been doing this. Some things that confuse me, if anybody can shed light:
1. Do other developed countries allow 20x leverage on cash to buy homes?
2. It seems like most real estate investors aren't pursuing commercial loans, but instead are using personal home-loans. Is there any regulation of this? ("Oh, I intended to live there, but then something happened")
3. How can banks afford to give out loans at interest rates that are less than inflation? Is this due to Federal Reserve rates, and if so - do other developed countries maintain such low interest rates + tax benefits for home purchases? It seems like the US government is propping up this entire industry, rather than letting a free market operate.