An optional auto insurance coverage that helps pay for your rental car expenses if an car covered by your auto insurance policy is damaged or stolen and you need a rental car. (smartautoinsurance.com)
I'm trying to figure out the rules on deduction of car expenses as a business expense. (money.stackexchange.com)
However, you can deduct car expenses only if your rental activity qualifies as a business or an investment for tax purposes. (nolo.com)