Expelling 10% or PR's ? I havent heard of that. Please expand and tell me where to find the article. I doubt they would get rid of PR's when they are trying to boost the population to 6.5 million for goodness sakes.
I think you need to read the news more often...
Another thing about rentals, the only way they would seriously go up is another en-bloc boom like 2007. With the new property regulations in force, I don't think there is much chance for en-blocs to go through. Not with the prices they are asking.