The juniors that race at our local track look like their grandparents are footing the bill. They all show up in box trailers pulled by monstrous motorhomes.
I was happy to own a 20" bicycle when I was a kid. I got a moped when I turned 14, but I had to pay for it.
Personally if I had kids they wouldn't be getting a dragster until they had learned a lot of mechanical skills and could really take care of it.
Tom