The only possible issues with a cannonball run:
1. Balancing for the possibility of a crash. One false move, or one unseen traffic car, and you're done.
3. Fuel and repairs.
1. We use only few traffic cars
2. We could have fines and/or ways to trick or avoid highway patrols
3. We could have garages along the route
#1 makes sense this is how sr1 and 2 were in road races.
#2 idk about tricks but, in the first 2 you got fined and if you didn't have money you showed to the burger joint behind jail bars.
# such garages existed, commercial auto shops. i've heard stories where guys paid money to use a bay and the tools to work on their car them selves. i think i have pictures such garages, REAL ones.