It’s not easy raising one child, let alone two, without a dual income. Now imagine single parenting in a pricey housing market, where most high-paying jobs are concentrated. Unfortunately, the dollar amount required for a secure household in some of the biggest cities reaches far beyond mid-range wages, according to a new report. CareerTrends, Graphiq’s employment research site, used the Economic Policy Institute’s 2015 Family Budget Calculator for location-specific overhead on childcare, food, healthcare, housing, taxes and transportation across 618 communities. With these expenses in mind, the national average cost of living for single parents is $4,818 per month, with seven locales requiring single parents to make over $7,000 per month: Washington D.C. New York …