How much are the spark plugs for 97 expedition and how difficult to replace.

I've heard a few different ways from needing a special tool which is an $800.00 tool, then I've also heard that the engine has to be moved forward 1.5 inches. 3.5 hrs is what every shop has been telling me as well and the price I got for spark plug was $25.00/set the magic number is round $300.00. the other thing with the sparks plugs is that they tend or already rusted and when you try to pull them out they snap, my 97 eddie bauer is going on 224k's i'm really not liking the "triton" block,