alright im gonna be a prick.. sorry Juz but has to be said.
$100 a week isnt enough to run an R32 or 33. u will not be able to afford it unless ur oldies help u out big time.
You have 3yrs untill you get ur P's thats a max of 15grand if you spend no money what so ever and save all of it. that will buy you a real nice R33 and prolly put rims, exhaust and a system in it.
by the time u get your P's petrol will probably be round $2.50 if not $3 so pretty much, there goes your pay check.
Add the fact of insurance which will be 2grand for 3rd party fire and theft and service fee of $200 every 5000 or 10,000kms (bout once or twice a year).
Maintaining the car is really a flip of the coin. You may not have to spend too much to keep it clean and what not, but then you may have to spend alot. Im lucky enough to not need to spend anything (so far, touches wood). but i have had damage to my car and have fixed it myself. People can be pricks who will damage it.
This is a possibility. Being young and a gregs boy, you're going to show off a fair bit in it. That will mean new tyres every few months, not once a year. The other side of that coin is repairing the damage if/when you crash or the excess. Or even having your car confiscated by the Popos, paying the fines and all that.
My last point ill raise will be the police. They are going to be a prick to you. They are to me. the last car i drove i was never pulled over. I buy the skyline and every cop that is behind me pulls me over just about and goes right through it.
Skylines are alot of fun to drive and own, but they cost alot to keep. I ca afford to buy a R32 GTR if i want one, but i cant afford to maintain it especially if i have to do an engine rebuild. Honestly mate buy a little front wheel drive car and learn to drive. when you finish school get a full time job and then buy one. Its the smarter option.
But good luck either way mate. You got plenty of time to think about it i guess and by the time you're ready to buy i might be ready to sell