i did my R32 GTS-4 about 2 months ago and i can tell you now if you don't have the tools to do it or know what you are doing it is a bitch. my mates and i had the tools and we knew how to do it in theory ( what we read on this site ). i got everything off a half cut for $1200. thats everything, gearbox, clutch, flywheel, pedals, console parts, fornt and rear drive shafts, computer, and every bolt for it. it took about 4 days to get everything done and we also used a 180b input shaft to align the cluth which was very easy as well.
the R33 gearbox's go for a bit more so i'd say you'd be up for about just over $2g's.