I think there some modified WRX's in this site...it was of the Auto Salon here on Sydney that was on Sunday:
http://www.markpakula.com/sas/
For modded WRX's, this has had crazy money thrown at it...he and his brothers all drive/own heavily modded WRXs:
http://www.squashedpossum.i8.com/cgi.../as/osman1.jpg
And this guy, RBABY, is famous on the modified car scene here....he reckons he spent $200,000 on his Holden Barina (he likes to think it is a Suzuki Swift) - I have a video of him on a racetrack.....with wheely bars!!
http://www.squashedpossum.i8.com/cgi.../as/Rbaby3.jpg
As for how they afford it, wish I knew
Jamsvx