On today's Planet Money, we meet a single mother who makes $16,000 a year — and who managed to fund a vacation at a Caribbean resort with an interest-free loan from one of the world's largest banks.
Edith Calzado gets credit cards with teaser zero-percent interest rates — then transfers her balance before the rate ticks up. She signs up for store cards to get discounts — then pays off her bill on time. She gets food stamps and lives in subsidized housing. Her son is doing well in school.