I just checked, I drive my truck just a few times per month, and it is still cheaper to keep it (paying taxes and maintenance) than to rent the correct vehicle for my rare needs to drive. Renting is expensive, but I did discover enterprise truck rental which I didn't know of before isn't too far from my house. Plus by owning my own truck I have it when I want to go.

Of course I ride my bike most places. There are a few trips every month I make not in bike range though. If like most people I drove a car to work, then a tiny compact car and rent a truck when needed would make sense. But for me I drive to little that a large truck that does anything is cheapest (I've had the truck for 15 years)