I am not aware of any unlimited kilometre rates at Ayers Rock Airport and will be limited to 100km per day regardless
I can't find a day with an FCAR to confirm price, but if you join Defcom, you can rent a Fullsize(D) Toyota Camry Sedan or similar (DCAR) for AUD84.89 a day for a pay later rate,, which comes to AUD254.79 for 3 days. plus 25c per km over - points bookings should only allow groups A, B, H, C, S or D anyway
It costs $28.50 for 1 year's associate membership or $50 for 5 years associate membership - join at
https://www.defcom.com.au/membership_am.html ( anyone is eligible to become a member ). You will then be entitled to use the DEFCOM CDP
Total price then comes to AUD283.20 plus $100 for the excess Km - or about USD260
The DEFCOM rate applies across Australia - the location fees vary by location but base rate stays the same
Not sure why AYQ is not offering weekend rates