Take it from someone who should have moved his son also, there are many schools in the knox area that can get your son the facilities, support, coach and $ for gear and most of all, the exposure that he can't get at alot of struggling programs.
Hardin Valley went from a program that didn't exist and after 3 years they have won the 3-AAA tournament and it looks like they will continue to climb. Coach Renegar is an excellent coach and does things the right way.
My son plays in this district and I wish that we would have moved for him to play in a few of this districts programs.
Good Luck!