Ian, I really shouldn't, but... if you don't mind me asking, is that a gift for your GF?
To the question:
I've researched this to a certain extent and found that used parts (stock exhaust mani, turbo, plumbing, downpipe) can be found for about that much. THis provided that you don't change the ECU and run with no I/C which means very limited boost(~6psi).
This is a very intro approach to a turbo kit. This is what they usually sell for hondas for ~$1500. Check DSM trader, there are dosens of people selling stock parts for little over shipping cost.
ON THE OTHER HAND it is debatable how will a high milege car(like mine
) respond to an increase in cylinder pressure.
a) with increased performance or
b) with increased fuel consumption or
c) with blowby that shoots the dipstick through the hood
d) all of the above
I'd think yuo really have to watch the engine condition. Otherwize it may be trouble.