Nowhere near as expensive. I have the tailight replaced, the new bumper is here waiting for paint and fitting and the car is still sporting track spec ally sheet. About $300 to fix and I didn't miss a lap.
My problem was not seeing the flames, just saw the heat shimmer as I rolled around but that is expected after some hot laps. I was in the helmet, pulled way down into the seat and was watching for cars coming as turn 3 is 180kmh for me and faster for others. Flaggies didn't help with confusing flag signals. Ultimately no real danger, just cosmetic damage.