The simplest and cheapest option outside of public roads would be to rent Bishopscourt for the day. No timing gear just an open 1/4 mile flat out acceleration or even just the 8th and onto the drift loop. But its a zillion miles from cash rich Hillsborough, and the day punters that would turn up. Plus its hardly the most attractive place on the planet. But perfect for putting a supercar through its paces in a safe environment.