I’m a 39-year-old single dad with $600,000 saved — I want to retire at 50 but don’t know how. What should I do? – MarketWatch

I am a 39-year-old single father of one 16-year-old son. I have $70,000 in liquid savings, $530,000 invested in individual retirement accounts and owe $210,000 on a home worth $500,000. I also owe ab… [+8267 chars]