I had a ball joint let go on a road course a couple years ago, although I didn't suffer as much damage as you.
Basically it tore up my fender liner, bent my fender a bit and ripped my inner & outer CV joint boots..
Torn fender liner.
Inner CV jopint separation.
Outter CV joint.
Fender damage.
Fender damage.
It wasn't a ball joint failure however... The nut backed off and the ball joint dropped out. Some new boots and a fender liner and I was good to go.