Danielle and Jonathan Rivera ensure their family eats thanks in no small part to careful planning and kitchen wizardry. Jonathan, age 36, works at Brickell’s Socal Cantina, where he makes about $20,000 a year as a cook. Danielle, who uses a cane or a walker because of a disability, is able to earn a small income on Amazon’s Mechanical Turk by doing menial online tasks for about $7.25 an hour,…
