"If everyone wanted to become a renter, and not to buy, then all existing property investors who already own property would have no buyers for their properties, and all current investors would incur massive losses, yourself included."
Actually her logic is fine as in that environment we would be making lots of money through rent and the vast majority would have no motivation to sell. As for the actual property value at the time even if it crashed in the short term WHO CARES as if you are investing for a 10+ year period the the actual value of the property is largely irrelevant.
