whuts wrong with a 70k car, if you can afford it then go for it..but if you only have 70k to your name, then buy something cheaper (R34 GTT) or even and R33 and keep the rest to insure / run the car and also to invest elsewhere..
when you purchase a car for 70k, it doesnt end there, rego, insurance, fuell bills, servicing and things breaking on you add up quite fast...
that said, i was given 50k by my parents when i entered high school which was invested on my behalf and now at 20 i have some nice change hanging around. at 18 i possesed an apartment and several acres of land in my name which will only increase in value.
having said that, i only buy 2nd hand cars with my own money as all it does is depreciate and the R33 is no exception. in abt a month or so, im going to sell the 'Line and open up 2 shops one of which is a cafe, im always on the lookout for investments and hope you think carefully before spending your 70k