1) Find a near perfect low milage R34 GTR
2) Get Nismo to dedicate resource to start up a production team (probably funded by your good self
3) get them to strip the car down to the bare chassis and shell then put it back together again
4) get them to build another 500 bhp GT spec engine
5) get more custom parts made
If you can afford to do all this you can afford a Zonda F or an Enzo and hence not buy a Z-tune
Only other option would be the most ridiculous group buy of all time!
Soz man, just telling you how it is
Sev