Talking to your Maine neighbors may give you a lead ? Also see if you can get just liability?
I pay a lot for insurance as my fire department's motto seems to be "no small fires." No hydrants for miles. One company suggested digging a pond; I figured the pond, besides being expensive, would bump my liability rates too. Sounds like you're painting the house which sits mostly unoccupied, companies don't like that either. Consider not insuring the barn, although I had a similar barn that went up like a roman candle and the company I had was really easy to deal with. I don't think Agway Insurance is still around, likely some connection there. I think the mindset of companies is that a well maintained, owner occupied place is less of a risk, my new company made me do handrails, chimney caps, and a general tidying up, all of which was reasonable.
For a few years an itinerant barn painter from South Carolina would knock on my door and tell me he would paint my barn for X thousand dollars; I would tell him to go away, and the next year he would knock and come down 20% or so. After a few years we struck a deal. His crew showed up hours later with some big spraying rigs and did a good job in a few hours. No detail work, no prep, just a lot of paint. I had to scrape paint off windows, and I had to paint over trim, but he took a job that would have cost me a lot of time and money, made it look easy. Years later it still looks good.