at high 'racing' speeds, perhaps you should be aware that it doesn't have the best aerodynamics for road-holding (i.e. negative lift or downforce). also many people have reported some vibration issues that couldn't be resolved; https://forums.tesla.com/forum/forums/vibration-high-speeds
a sustainable revenue model that i can imagine is something similar linkedin; 2 or 3 classes of monthly or yearly subscriptions to reach out to 2 or 3 different 'tiers' of experts. this way you don't have to worry too much about transactions outside the platform or locking users in.