~snip~
What I meant was renting house when we don't have any responsibility so we can save more money, so later on when we have family we can buy the house in either full-cash, or in short-term installment, like less 10 years. In that case we don't need to pay 30 years of mortgages, but then again, I don't know if it's applicable in other countries but from where I can from it is still doable.
Fair enough, yes, that might be possible to do... or maybe not.
There's no way to know the price of the houses in the future, and most likely they will be much more expensive than what they are today.
But you're right, in some cases it is cheaper to rent than to buy the same house, and you can invest the difference.
It is still a gamble for your future self to see if you first manage to save enough, and the house prices doesn't grow at a much faster rate, making it impossible.