haha im in the same position but my options are a r34 25GT or S15 Autech
and i'd aim to buy a gtr by the time im off my p's r34 gtr that is
well it goes down to really where you live, cos i really wanted a r33 series 2 but theyres so many r33s in general in my area, and now i notice a lot of series 2 33s so thats why i moved up. but because your in tafe go for the cheapest option which is a r33 gts, or if your lucky a nice r32 25gts would be mint
or you could even go for a s14a, as it would be a lot cheaper on petrol than a skyline, but if you get the micra then petrol wouldnt matter.
so i guess your best option would be get the r33 and then get the gtr when your ready