### Comment:
The problem is that they can't buy all of the houses.  Builders will simply increase supply to match the increased demand. In turn, lowering the price of housing (builders are going crazy right now where I live). 
  
 edit: also the issue is what a company is willing to pay, not what they can pay.  They have to consider what their return is going to be based on the potential rent.

### REPLY:
Except, not really. There is only so much demand for a house that would mean a two hour commute to your workplace, and no public transportation.

### END.