Landlords who have bought in the last two years might have difficulty covering their mortgage. Those who have a few properties, some of which were bought a number of years ago, will have no problem supplementing a mortgage on one from rents on the others.
As to people not willing to pay rents asked....I wish them luck. Recent reports on TV have indicated that rents are rising but that does not mean landlords are passing on interest hikes in their entirety. Those who wish to rent have to live somewhere so I don't think it feasible to imagine that landlords will drop their rents to accomodate them!