If you want to get 75k easy, - Gran Turismo 2
If you want to get 75k easy, here's what you do
1) buy a tommykaira, the one worth 43 or 63k, something like that
2) soup it up to about 585 or so
3) win the seattle circuit muscle car race
4) you will get a cobra, worth 75k. sell it.
5) continue winning and selling.