✔ 最佳答案
Yes, there are specialist insurance brokers who deal with higher risk/unusual proposals just as there are in the UK.
If you're visiting the USA under the Visa Waiver Scheme then as a UK citizen you can only stay for three months, although you get six months if you have any entitlement to an Irish passport. So you'd have to complete your journey within your visa limit. Short term insurance always costs far more proportionally than annual insurance.
But there is a potentially better and cheaper option. Americans move house, like anyone else, but it can be over much larger distances than in most other countries which many are unwilling to drive and a vehicle transporter is too expensive, so there are agencies which match cars which need relocation to drivers needing cheap transportation. You can often arrange a trip across the USA by linking various ferrying trips and the cars will already carry their own insurance because of the difference between the way car insurance works in the USA compared to the UK. You get to meet far more people and often stay overnight with them and you'll see parts of the USA most tourists never experience, although that's not always a good thing! Don't expect to get paid for transporting the vehicle though, as it's effectively free car rental, and so you'll usually be expected to pay for fuel, oil, and tyres if you puncture any, but you face the same costs on your original idea and likely in a risky cheap unreliable clunker as well.