Do we know if she had a life insurance policy? Its been stated she was frugal with herself so she could give everything to the boys. I wouldnt be surprised if she spent the couple hundreds bucks a month on a policy for the boys.
There is money in a trust from a malpractice lawsuit, and money from the sale of the home.
From Business Insider: "Lynda Cruz in 2008 settled a medical malpractice suit against a doctor and a clinic over her husband's medical treatment before his death, the Herald reported. A court-appointed attorney recommended the couple's two adoptive children, Nikolas Cruz and his brother, Zachary Cruz, receive $175,000 to be kept in a trust fund until adulthood, the report says." "Lynda Cruz also sold her Parkland home last year for $575,000, the Herald reported, citing Broward County property records."
Is it possible when you add the 575,000 to 175,000 (750,000) it gets to the number he thought he was going to come into?
It has to be fairly sizable because the guardian (Deschamps?) has petitioned the court to handle the estate. If it was close to nothing, she could not get a whole lot to administer so why petition?