I started in a car (hatchback toyota), before upgrading to a van. The main reason for this was to keep my outlay low in the beginning, its ok to say you need a van you need this you need that, but you have to be realistic when starting out and do it the way you can afford. It is no good going out and spending 3k on a van 2k on a machine and another 1k on all the bits you need when you may only have 2k to start with. I have seen so many people start up in this industry around my way going out and getting the loans for the machines and vans and not having any cash left for the most important part.................advertising.
When starting get what you NEED, not what you would like, once you get the work and you get repeat business then look at upgrading everything, machine vans etc.
So stick with your car until you know you can make a living from this cutthroat industry before spending all your cash.