I would not be thinking of manufacturers getting involved yet. Gotta prove that anything like this idea could work at a single track first. Let alone thinking on grand scale. The 2 tracks in my area don't even seem to acknowledge the other exsists.

We've been running a for fun only 1/18 for 3 years. Started with Associated mini Apex, then the Dromida trucks took over. Last summer was good, 10-20 people every other Sunday. From 5-70+ in age. Had high hopes that this summer would be better. Turnout had been down this year, but still fun. While we run as road course, jumps could be added easy for buggy or trucks. Simple 5 lap sprints. Crash your out.

https://youtu.be/nIihNc4TPz4