I suggest getting clarification in writing from your insurance carrier as to exactly what's covered on the tractor. Mine covers anything on my tractor while it's on my property (fire, theft, lightening, injury, etc) within the limits of my home/property AND liability umbrella policies. When I'm using it for occasional non-reimbursed work off my property, it's also covered - I framed the query around tractor use at the hunt club I belong to and which has a half dozen "work days" a year. If anyone else uses my tractor while it's off property I have NO coverage. If I get paid for tractor work, NO coverage.
Most tractor dealers can tell you who has the best commercial coverage for tractors in your state - be prepared to pay quite a bit (see prior post).
Most tractor dealers can tell you who has the best commercial coverage for tractors in your state - be prepared to pay quite a bit (see prior post).