Depends on what type of hotshotting you are talking about. If you are thinking RV transport or auto transport, maybe a million in liability and $100 k in cargo is enough, but if you are talking about general merchandise or specialized tools that probably won't be enough. The company I work for carries well over a million in cargo insurance and much more than that in liability ins. I've carried tools in the back of my truck that were worth between 1/2 and 3/4 million dollars. Like I said, depends on what type of hotshotting your are going to get into. Your friend might be better off leasing on with someone, just be sure he reads and understands the lease.