What does F1600 really cost?

Hello all. I am yet another budget-limited father of a talented son. I'm trying to figure out how to get him where he might get noticed. If I bought a car, what does it really cost to run a single race weekend? Assuming nothing gets bent, of course.

I would sincerely appreciate reliable information from guys that are actually out there doing it. Thank you.

Dallaswinefan