How much Cargo Insurance Required?

I'm looking at getting into car hauling with 9 car setup. What insurance coverage are brokers typically wanting on central dispatch? I was thinking 1 million liablity, 250k cargo, but wondered if the cargo might need to be higher? Appreciate any insight

 

Makes sense, thanks for the info

 

Anyone have any recommendations on insurance companies? My current provider is Progressive and apparently the max cargo insurance they will provide is 250k

 

I was looking at the load boards, looks like it'd be a nightmare to get everything going the same direction but could be wrong. I think might be better with a 3 car setup if you don't have a connection in industry, but would rather stick to flatbed than do that. I only was looking at superdispatch load board though central dispatch may be different