This was one of the most difficult things that I have ever tackled on a car. I did end up going in through the engine compartment with about 30" of extensions and a breaker bar. The "demon bolt" finally broke after about 15 minutes of pulling.
I did try bringing it to a few places to get an estimate (even two NISSAN dealers) and they basically said
. With some persistence, PB Blaster and long extensions, it can be done. But be prepared for a few WTF moments.