Last time I rented an Enterprise it was (with insurance) something like 300 bucks for the weekend. I later found my existing vehicle insurance (The RV policy) would NOT have covered it so .... good thing.
Most car insurance policies cover rental insurance. Certain credit card companies such as Capital One also take on the liability. Just ask your agent or look at the CC company's agreement. Enterprise will pick you up/drop you off but be prepared it may take some time as you are not always the only one in the vehicle.