My friends 34 and has a really nice house designed by himself - he's a property developer/jackofalltrades.
He did have help from family but to put this into perspective, before he got the porsche/ferrari, he was driving a done-up SS ute last year.
Don't aim too high too soon, if i were you i'd pay cash on a R33 GTSt approx $20,000 and then look to a unit next, and then whatever gee-whiz brand new import is available in 2-3yrs!
Cheers!