Front wheel bearings need to be removed in order to remove the ball joint from the knuckle. Depending on your mileage and where the car has spent its life, it may be hard to remove those wheel bearings without damaging them. (I Just went through this on my car). At a minimum the BJ job will require labor of removing the bearings.
And FDR is correct - be sure to factor in the cost of an alignment after the job is done. If your rear settings are good meaning your rear bushings are in good shape, and the rear toe links have not failed, you might be able to get away with a 2-wheel (front) alignment.
If you decide to order Moog tie rods and BJ's - let me know if you receive any guidance on what grease to use for the "problemsolver" parts. I got all my stuff from rockauto and the instructions dont say anything about greasing them before install/first drive, or what grease to use. I have all my stuff on the car, but haven't driven it because I just got a grease gun today.