ouch, that sucks. Sorry to hear that! Suspect it will be more than a few hundred bucks to fix that though...
I don't think so, with someone that does body work full time I wouldn't expect it to be more than $500 with either spot welding or bondo and a respray/blend.
That is tough though, I'm a huge proponent of not messing with OEM stuff, and trying to mod around it for the most part. If you do mod something extensively, its got to be done right with quality parts the first time, like the ADD mount for example.