Small light cars have a lot of economy for going fast. As you and others have said, easier on parts, not as much power needed and even lighter to tow so you don't use as much gas. I would look for a roller super comp car that someone is letting go to move up. It would be certified if you want to faster in the future and should run easy 10s with a mild small block. I suggest going as much cubic inch as possible so you don't have to rev it to high.

Pat