my dad hired me a boxster S from the place in richmond.
It cost 300 for 24hrs because my mum got it 1/2 price. But normally its 600 something for a boxster for 1 day and you get to do 200kms.
However I done about 500 and when I took it back the guy didnt make me pay anything extra. Insurance is about 2-3g I think.
The lambo's and ferraris were about 1500 per day, i dont know where you saw 500 from inasnt