Unless you're p5, it'd likely be cheaper to just ditch football than to actually attempt to daily test an entire football team. Honestly, the whole thing is almost a joke because it's inevitable that many of these kids will get infected. And when they do, it's going to just end in another shutdown just like it did for the nba. It's going to be a liability for the schools, many parents are going to be ok with it and there will end up being lawsuits out of the ass when the inevitable happens.
Easy fix to this issue. Have a liability waiver that kids and parents sign. If you refuse then the kid does not play. To play you give up the right to sue. If a few players don't play then fine but it would not be many who would refuse to give up the right to sue.