I did the insurance thing BEFORE I bought the bus, converted it, or drove it.
Sorry you're having a rough time of it, but your attitude is likely not helping you achieve your goals.
I talked to insurance companies for weeks. They wouldn't cover a converted bus, so I insured it with a commercial policy. When the conversion is all done, I'll shop around and find an rv policy BEFORE I cancel the commercial policy.
Have you tried getting a commercial policy through a local agent and NOT telling corporate that you've done any conversion?
Try it when you're in a really good mood sometime.