Does anyone have insurance on their raceboat?

Let me explain.....

My garage is its' own building a mile away from my house. I had the agent who has my homeowners' policy come out and give me a quote on the structure. He told me that the boat, motor, spare parts, accessories, gear and whatnot would not be covered.

The boat would have to have its' own policy and.......it is likely nobody would write a policy to cover it because of its' nature.

I thought for sure it would be covered while sitting in the garage against fire, theft, or if a tree fell on it or something-but I guess not. I would totally understand why nobody would insure it while in use.

What do you do to protect your boat?

Thanks