one bright spot to this is that whoever did this will not have the seeds to ever come back to your facility. I know it sucks now but this karting community is too small for people to make thefts of this size and stay in the circle. It will come out.
2 things about the karting community:
1. It is small
2. Everyone speaks to everyone.
It is unfortunate that you and your family invest that much time and money to provide the coolest track in North America only to have people take advantage of it. There are also 2 types of people in the world. The ones that have the balls to go make themselves successful, and the ones that envy that success and take from you.
Wow, this must have really struck a nerve with me. I am pissed off!