I mostly live in the USA, travel a lot for photography and other magazine projects. I thought of buying a car but honestly it is just a lot to take care of, and for me and other people like me who travel around , it is not very good deal.
I suggest car hire services will do the work best and for me, it has been always dollar rent-a-car. I have been enjoying their services for last 4 great years. They have great rental offers, really resonable and the services are very on your budget.
They have various cars for the rental according to the requirement, like sometime I travel alone but most of times, it is with some assiatant or a crew. They got SUVs, minivan, luxury cars, you name it.
Being a regular with them, I got lot of discounts once in a while which further reduces the expense. Their system overall is very quick, computerized, so nothing seem very far fetched even if someone coming for the first time.