In the past two weeks, Cheapflights users have found many deals under Rp 1,164,732/day when booking a rental car in South Island. The absolute best deal a user found was for Rp 855,443/day from Thrifty, booked on Jul. 28.
From Apex you can rent a car from about Rp 2,402,758 per week on average.
Booking your car rental early can save you up to 7% on your reservation. Aim to book your car rental at least 14 days in advance to take advantage of a below-average price.
Yes, renting a vehicle in South Island for a month is certainly possible.