As a 13 year old, I low key wanna do this if they ever come to CA. I got bike experience, and I've been making some makeshift ramps for some bmx action lately. I think I got what it takes. it would be hella expensive though.
You don’t have any public tracks near you? I live in illinois and the nearest “big” city to me has a dirt BMX track at their large park. They have races there and it’s available for public use when there aren’t any races going on. Do some research, find a track and go ride.
