So all of these two parent households are working because they'd rather not have that second car, really nice clothes, makeup, golf and getting their nails done? Two parent households don't exist in large numbers because neither parent is willing to make the sacrifice of staying home with their child or children. I am the daughter of immigrants whose parents went without in order to rear their children. As did many other lower middle class people of that era. If parents had the same goals today they would make the same choices.
Libertarianism holds freedom of choice above all other values, and is loathe to penalize except in the most flagrant, unavoidable cases. Libertarianism may have some thing to offer the country, but only when part of the eclectic mix already arrived at by the electorate. They will never gain but a slight amount of steam, because more people than not perceive the results of pure libertarianism as an economic, defense of state, socially devolving abyss.
I admire your family's willingness to sacrifice for the benefit of their children. However that has nothing to do with the government robbing your parents (and everyone else's) blind, forcing them to make sacrifices they shouldn't have to make. Stealing is ALWAYS wrong, not just when it's from people we like and that's what government does. You make it sound like the problem is just selfish, materialistic parents when it's actually relentless government thievery.
Where to begin? We are libertarians, not libertines. We believe in liberty, not license. The politicians who claim to represent your values (family, hard work, sacrifice) are actually betraying them by stealing from you and everyone else. They say they have to steal your money so they can promote your values. No!!! The ends don't justify the means. You are the best spokesperson for your values. You don't need smooth-talking thieves to bribe people into accepting your values. Your values can thrive on their own.