This car rental business is driving me crazy -- the price keeps jumping around; they give you a weekly rate and then by the time you add two extra days ( we will be on Big Island 9 days), all the taxes, fees and such and the rate goes from $400 up to $720 --- ridiculous! Have been using Hawaii discount car rental.com and this is for a van since we are 7 persons. Does this seem reasonable or way out of line? I just can't tell anymore. Trip is coming up end of July.