For the average private school (christian or otherwise) i'd say 15,000-20,000 for tuition then another 3000-5000 for room and board. But keep in mind that the higher your tuition is, the more money you can expect to recieve in scholarships and state/federal grants. It only costs me about 1,500--in loans

--more per year to go to a private school than it would have to have gone to a state school with roughly 1/3 the tuition cost.