Stacy Roberts says she took $83,000 worth of vacations for $4,300. Here’s howStacy Roberts likes to tell her 321,000 followers that her family is rich – in credit card points, that is. Last year alone, she, her husband and their three kids traveled to Spain, Denmark, Austria, Italy, California, Utah and Hawaii all for around $4,300, she says.How does she do it? Roberts says she opens a new credit card each month, allowing her to accumulate around 1m points a year.An adviser on the estate documen