Hi Age,
Good to see someone has thought logically, and decided they can't affoed a GTR. Even though alot of ppl want a GTR, it is hard to stand back and say; "i need money for; insurance, rego, repairs (there is always huge repair costs on a sub $20K GTR), servicing, fuel, etc..."
I truly beleive that the GTS-4 is rated under a GTS-t, as the 4wd system sucks too much power out of the rb20 motor. With any R32 you are looking at a 12+yr old car. So be aware of rust, perished suspension components (bushes, springs, shocks, brakes, etc), wear and other unforseen expenses.
Try and find a car with all the majors completed, good brakes, new bushes, good tyres, etc. DON'T only look at what performace mods it has, or if it has a fmic with a BOV
Complete a search and read up on what to look for when buying a Skyline, before you even start looking at actual cars. The more you know the more you can bargin and the less it will cost you in the long run.
Good Luck
Alan