OMG, when we get more people buying again, we will have higher rental vacancies! Really, like that's not completely obvious to everyone?
People displaced by Short-Sale or Foreclosure....they are renting. But, yes, they'll be back.
People that can't qualify with the tight standards.....they are renting too. But, you bet, when standards slack off a bit, and we know they will, they'll want to buy as well.
Youngsters, and some oldsters too, that can't find a well paying job and even with low prices and rates can't afford to buy......yep, renters! When the economy comes back, they'll be coming back to buy for sure!
So, investors beware, be calculating, be smart. Realize that in a few years the rent you are getting today ~ you likely won't get tomorrow. So, a few hundred bucks here or there, count on not having it if you want to keep your properties occupied.
Make sure that you are crunching your numbers correctly.
And, that the math makes sense.