~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.
Let put aside the rising cost of houses in the future which is certain to happen and then analyze the life of a family man to that of a single man and responsibilities. As a single young man with money it's easier to achieve many planned projects in your life than when you turn a family man with increased responsibility from kids and wife coupled together with that of yours. A single man only has his problem alone to care for as he is not obliged about others problems.
So building your own house as a young man when you can it's better and wisdom than renting waiting for when you get a family before embarking on it. Chances are that you not be able to build that house of your taste if you are lucky to afford building any because at that time your responsibility has tripled