@Rod Blunk why do you not want to be viewed as a General Contractor? Let me know what you are looking to do and I can help you try and get classified appropriately.
Rates for the General per home are about $2500 through our corporation ownership where as when we were buying without being a corporation (in my own name) I can get insurance for the same home at $1000. So we are trying to get insurance per home as the corporation buying it for the rehab work to be closer to the insurance rate as an individual.
@Rod Blunk OK, it looked as if you were questioning the General Liability coverage and not the property coverage.
When it comes to buying property for rehab/flip/rental, there should not be any difference in premiums. I think the issue is the insurance carrier you are working with, not the way you are set up.
If you have an agent that can only offer 1 option, it's time to find a new agent.