It is possible if you cut your lifestyle down. My wife and I are doing it on a 35k a year single income. My wife is a stay-at-home mom who is going to home school our children. We have no debt but the house and that we plan to pay off in 3-4 years. It is a sacrifice we chose for our kids.
D&A is a single dad, not something he could do. But the school voucher would give him the opportunity for his kids to have some choice with his tax dollars.