If you want a basic, no-frills Tesla Model S, you can (apparently) get one much more easily now.
The Tesla.com NZ web site now includes pricing for car finance.
You can order a basic Model S with a 75kWh battery (range about 350km-400km real world) and all wheel drive (full price $121,395 - incl GST and on-road costs) by putting down as little as 10% up front ($12,140) and on a 5 year loan paying $1,726 / month......with a final "balloon" payment of $30,349 due at the end of the 60 month term. This places the total cost of the car at $146,070......but you didn't have to stump up the full price on Day One....
You could factor in never buying petrol and also have free access to the Tesla Supercharging network in NZ (10 sites by the end of 2018).
This is the cheapest option (well.....lowest cashflow option) . Choose more options and the monthly payment doesn't go up much.....but the balloon payment gets bigger.
So can you afford $1726 / month? That's about $432 / week.
If you can put down 30% up front, the monthly payments fall to $1249. The balloon payment stays the same.
Have a play. It would definitely make it easier to get into a Tesla Model S. The basic model doesn't include access to the self-driving functionality.