I say let the car dealer figure it out if they want your business. They are the ones who is getting 30k paid! If they don't take a forgeign credit card, I would think that you should be able to wire money to the dealers's account without bringing any third party in between. BOA charges forgein transaction fees I think. Get the card that doesn't charge foregein transaction fee. For e.g. Chase Amazon card doesn't have foregein transaction fee. That will save you 3%.

I saw in the news few months ago that Nepal is waving import tax on electric vehicles that is whooping 200% import tax savings!