In Jefferson County, I believe that Manual has prospered due to the high cost of Private schools more than anyone due to the "perceived" excellence of education and no tuition. However, we all know you get what you pay for, or, what you don't pay for.
Those that choose private schools usually do this with out the cost as a consideration, but, the quality of education and the quality of the athletic programs. Manual has gotten more parochial school kids in recent years than any one outside the private system.