current car insurance offers

Car Rental Questions?
My problem is twofold. I do not have a credit card or have an insurance policy in force. I live in the city and use public transport or walking my feet. He had booked a reservation with the company, but they want to hire an additional $ 200 deposit, duplication my initial rental fee. Also, I'm having trouble figuring out what to do about insurance. Enterprise offers both Collission Waiver and damage coverage, This would double the rental cost me too. Are there any affordable options that I'm not seeing?
No. …. is your vehicle, you are at their mercy. Do not let anyone just rented their cars without asking something about it, especially if you're renting with cash.
Insurance Institute for Highway Safety: 2008 Top Safety Pick