as others have said without knowing milage its difficult...

but i think hes wise in advising you to replace stuff while he is there, suspension stuff is always labour intensive and best to do in pairs.

I would (personnaly) also get all the bushes done and replace the sway bar links as a matter of course, hes goign to have to (try) and undo ia lot of it anyway and the parts prices are cheap - in some cases it will be faster for him to 'destructively' remove things if he knows that he has to replace them anyway than to try and 'carefully' remove them - the time difference offsetting the parts cost!

Having just done a sway bar link i can ttest they are a complete PITA to get undone when rusted on - much faster to just cut them off and replace and no matter how you look at it new has to be better than old!