Ball joint repair is farily simple. I do recommend doing it right away as mine required repair, but I didnt do it, and the ball joint snapped in two. When it did, the car a frame fell onto the rim.
Had the car towed and ordered the part. The terrible thing is that during the install of the ball joint, my Speed sensor got broken and thats another $170 part.
SO, the moral of the story is to replace the ball joint soon, and when you do, be very careful of the Speed Sensor, its very fragile.
good luck
b