here's a neat case study (neat also because the 2nd page shows a plugin used internally by turner which could be seen as a bit of a preview of the type of changes we may see in sketchup itself)
Link Preview Image SketchUp Pro Case Study: Turner Construction and the WTC, Part 1Follow the SketchUpdate blog for SketchUp news, modeling tips and tricks, user stories and more.
favicon(sketchupdate.blogspot.com)
these people are building the tallest building in usa (and i happen to have a perfectly framed view of the thing down my street 😉 )..
of course they're not using sketchup as the backbone but they've definitely found a way to integrate it into their company.. and seriously, if sketchup wasn't helping them make things happen, they wouldn't be using it.
there isn't a one software solution out there right now.. even i use a two software approach for the drawings (3 if you count layout as a separate software)..
i guarantee your friend could find a way to use sketchup in a way that would benefit if he so desired.
(ok.. not quite with the guarantee bit.. i don't actually know what he does)
[edit] hm.. maybe they aren't building the towers.. just the crazy new downtown station.. in which case, i don't have much of a view of said project..