Instead of saving up for their sons’ college education, Bill Dunham and his wife are taking out loans for high school. Their eldest son will begin ninth grade at a school in Boston where annual tuition runs around $10,000 — and they already pay $5,000 a year for their younger child. A project manager for a mechanical construction company, Dunham says the schools referred him to lenders who specialize in pre-college education loans. He’s taking a loan to cover his son’s full high school tuition, which he plans to repay over two years. “If we had the money, we’d pay it now,” he says.