It depends on the car rental company. It will be much faster and beneficial if you have a credit card. Using a credit card the hold on the card can be from $150 and up to $500. After you return the car to the company the credit hold to be released can take up to 3 or 4 days. Again it can depend of the company. If you do not have a credit card then the risk for the company will be higher, therefore, you will be required to give cash and it might be a higher amount than indicated above due to the individual status with the company.
You will need to call them for that, they do not have that pricing on their website.
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