I don't mind paying for insurance if it is logical, reasonable, and I have some inkling that the company is honest and forth rite. $351 a sq ft is 12,229% higher than what my local builder quoted. The fact that they won't say whether or not they will pay it, tells me they won't pay it.
Well, two things.
One, I have tried every local insurance broker. If you are honest with them, and you machine anything for consumer products, or anything for industry, then you are un-insurable. I could lie, or obfuscate the truth, like many do and advocate doing, but I won't.
Second, I am sure your premiums are high, but if you have 7 buildings on a farm, you probably have significantly higher earnings than me, and probably pay less in property taxes. Your interest for loans are federally subsidized, and your insurance includes crop losses, etc. So are they comparable? Probably not.