Not sure how many miles on your rig but I did the whole front end on mine around 120k. It wasn't completely shot -my mechanic has the same truck and said he'd seen a lot worse
You'll need an alignment afterwards so it makes sense to do all the BJs at one shot. If you have slop in your steering, you may also want to a look at the steering linkage (idler arms are big wear items on our trucks, outer and inner tie rod ends) since that also requires re-alignment afterwards.
Last point- ask them to use decent quality components (like Moog). It's only a few dollars more but worth it in the long run