Due to my living arrangement, I don't have the means to do this myself. I noticed that the rear seal on the transfer case is leaking (and I hope its only that), so I need to have it replaced. What am I looking at to have my local shop do this?

 

They'll probably charge you at least an hour of labor. Probably more. This is easily something you can do in the grass somewhere.

I would wonder if your transfer case is over full do to a faulty front input seal...