Think people are making this sound a lot worse than it really is....
The only expensive bit you have there is the clutch.
Flywheel - http://www.driftworks.com/driftworks-superfly-350z-vq35de-lightweight-chromoly-flywheel.html
Clutch - http://www.eurocarparts.com/ecp/c/Nissan_350Z_3.5_2004/p/car-parts/car-transmission/clutch-and-associated-parts/clutch-kit/?641701280&1&230bd4a98f9fb836228fe2322cd2454ef19cce46&000069
Tyres, just go Part Worns. No need to fork out Hundreds of ££ on new tyres when you have a mountain of a bill already.
You could get a full set of tyres for less than £200 to pass the MOT
Exhaust, £100-£200 for 2nd hand.
Service depends how in depth you want it.
Wipers = eBay.