you may get a break, but why change parts that may or may not be bad, thats just a waste if you ask me, hell the trans could let go next and you'll wish you had that 500 or more you spent needlessly replace working parts.
i would only address known issues, fix stuff as it goes bad. like i said its all easy stuff to change yourself with a 30 dollar socket set and some wrenches, less then 50 in tools you get to keep. anything large you dont want spend real money on is for rent at pep boys or autozone, not even rent, you leave a deposit and they refund it when you return the tool.
water pump should not take more than an hour if its your first time and taking your time, its silly easy to change. alt, to easy to even talk about it, p/s pump, also easy, its 2 bolts and 2 hoses. idlers are a nut each to change see what im saying here?