The opportunity cost of defense budget in terms of private housing is $4666666.7 homes.
Opportunity cost is the cost of next best alternative foregone.
Formula to calculate the opportunity cost for defense budget in terms of private housing is:
= total defense spending/cost of a new home
= $700,000,000,000/$150,000.
In other words, we can say that we have to give up $4666666.7 homes when we are spending an amount of $700 billion on federal defense.