Remove wallpaper or hang 1/4 in drywall over top?

[Gabriel G.]

So I am curious, a friend of mine and I are working on a flip and some of the rooms have wallpaper all around. One of the contractors we spoke to mentioned that it may be cheaper to just put drywall over top instead of removing the wallpaper. I would have imagined that removing the wallpaper would have been cheaper... @Ned Carey @Russell Brazil @J Scott Any thoughts? (Some pictures below)

[Russell Brazil]

@Gabriel G. Removing wallpaper is kind of labor intensive, and it kind of sucks....but I think throwing drywall over top of it is going to cause more problems. The windows and doors wont line up depth wise with the new drywall, electrical outlets wont line up.  I would just remove the wallpaper and repair the walls underneath it.