3 weeks is probably for Clark getting into the news business. Since he is super he can write a whole bunch of aritcles and just send them out like crazy and actually get a few published. It might help if he has a related college degree, but it is believable.
It might be a bit fast for recovery, but we only know that rebuilding has started.
On the other hand, it still makes it so they can be dealing with the aftermath when they open the next film.
