with such a cool project going on, your telling me you have no one else helping you? you could save yourself a LOT of hours if you get a group of people helping with this.
and just out of curiosity, have you taken any design classes at all? wouldn't it be easier to do some things on CAD possibly?
one last thing, are you going to design just the body of the car or the car and all of it's parts? If your doing THE ENTIRE CAR your gonna want some help