The first 2 items probably aren't out of sight, given that the parts for the first are probably expensive, and the labor for the second is probably expensive.

As for the third item, I'd try to do a little epoxy fix of the existing switch (you said it works somewhat) before I'd spend that amount of $ for a nonessential item.

You may find better prices at an independent mechanic. That's where I have all of my work done. I't saved me $1000 on my evaporator replacement alone.

Troy
1995 E420 88k