Eh, one blows up, you just do a couple missions or so and buy another. Personally, I don't think I've actually lost a vehicle yet that wasn't directly due to my own stupidity, or the AI capitalizing on it, but it's Arma, so I know it happens. Here lately, I've been having a buttload of fun flying around in a gunship, preying on AI vehicles and hauling em back to sell. Don't always win, but I do win often enough to keep myself in the more expensive toys available.