Then honestly your probably best off getting a truck as your DD and buying a car trailer. Hell, even a tow dolly will do if you throw some quick releases on your front bumper.
You just have to decide whats more economical for you. Keep it on the road, pay ~1000 a year to insure it, and work around doing clearly illegal mods that will get you picked out on the way to the track. Buy a truck as a DD, suck up the extra gas cost, and pay an initial 1000-4000 for a dolly/trailer. Or Go rent a Uhaul Truck and trailer everytime your go ($150 or more).