The hardest part is pressing out the old and pressing in the new ball joints. Tearing it appart and back again is perrty easy..well I have done it like 20 times so that helps..anyway if you tear it down and just have the balljoints R & R then reassmeble your self will save you $$$$$$....
I think I paid 30 bucks to have mine R&R'ed.
BUTT ~ if your looking for a quick way then swap in your buddies axel, as long as he is giving you a killer deal and the balls don't rock back and forth...
It's not hard...just start tearing it apart hehehehe
Good Luck wish I was closer to give you a hand...