To make one to that size, you must have a very powerful engine. If made to scale even with plywood it would still weigh close to a ton, with frame and outsides and engine. On top of that you will have to add the weight of 6-9 people. Unless you want to go the speed of smell you will need power. You best option, go to a police auction and pick up a inexpensive car, v6 Honda or some thing. Then strip the shit out of it, making it two rear wheel drive with 2 wheel front steering. Next make a four middle tires nonpowered.
Its possible to complete this project for under 2000$. But lots of math and basic motor skills will be needed. I have made a similar project with my father out of a vw bug, after adding people and larger wheels, became a neat little paintball tank. Exceleration was a super disappointment, but still inexpensive project.