Without proper shelter, you and your family have 3 to 5 hours before you die.
To be truthful, during a nice Spring day, you might have longer before you have to worry about your family's lack of proper shelter.
Needless to say, I have provided a general overview of this important subject in Chapter Four: Shelter at Prepper: Surviving the Tough Times Ahead.
Extreme Long-Term Survival
For most people, learning how to build a debris hut, improvise several trap shelters, and having an understanding of log home construction, you should be fine.
What about families having a longer view or great resources.
James Rawles and et. al., over at Survival Blog, suggests you and your family invest in arable land, such as farms, orchards, or other food producing lands, to preserve your wealth. The idea is the land is used to produce an income and if needed to house and provide food for the family.
A pretty good idea for good times, but what about bad times?