@Kai Van Leuven - I like your train of thought, and will add my unsolicited $0.02....
1) Real estate is extremely niche. Those who I know who are most successful have picked a niche based on their skills and know it inside and out, including the demographic forces behind it. I think that anyone who doesn't take this approach is not in the game.
2) There is a gentleman out there, goes by "Warren Buffet", who is known for having made a couple of shekels over his career. Google him if needed. He is, among other things, obsessed with demographics and their effects on different markets. Real estate is no different. To me, knowing the long-term demographics as best as you can beats about anything else out there.
3) Given a long enough time line, 2 things happen: 1 is that survival rates drop to ZERO, and 2 is that most storms can be weathered. Hedge your bets. Keep liquidity high enough to not get caught. Know your niche enough to stress-test your assets. If you took a 25-40% hit in rental income for 12-18 months (possible, and even probable in some markets) would you be able to hang on? Put some hedges in place against market risks. Inflation does us in the property world a lot of good. Stagflation? Not as much. Hedge your worrying! One day we will all be gone, and none of this will matter. Collect the rent, and go enjoy life. Its short.
4) Educate yourself. Learn new ways to make money on property. Try them out. Talk to other investors. Rental marketing is still in the fkn dark ages. Most rental property management is total garbage. Be better. What can you do to make your property more appealing in a downturn? Can you creatively get extra revenue from it? Can you get better at negotiation? At buying property for a discount? What would be a skill you can learn to profit from a market correction?
The point being, is that there are risks out there we can't control, and no point in worrying about them. buy right, stay away from stupid risky loans, keep your properties in good condition, and just go be happy. Isn't that the point of all this?