first invest it so I am making more from it. Then I'd move back to NZ, buy a big house, models galore- with my own modelling workspace, Ferrari Enzo, Ferrari 575 Maranello, Koenig 550 Maranello, Porsche Cayenne Turbo, Merc SL55 AMG, Porsche 911 Turbo (Every generation) Alfa Romeo 156 GTA, HSV GTS300, BMW M5, Lamborghini Murcielago, Honda NSX, Ferrari Dino 246GT and Nissan R34 Skyline GTR V Spec II (The actual list is a lot longer than this ) from there I'd start my own tuning house specialising in European cars and another branch for Japanese cars- then a gym (I'm a fitness buff), top of the line electronic Gadgetry and appliances to top it off I'd buy a nice boat
Reallistically with the right investments and putting it towards business- I could turn it into as much as $500 million and then after about 5 years $1 billion