If you are wise you purchase a membership from the HEMS company, if it's available. For the high price of $49 a year my entire household is covered by both helicopters (two Bell 429's and I believe 3 407 GX's) & a King Air. They will send a helicopter up to 150 miles, the plane up to 500 miles to get us. There may be minimal charges after that, but certainly not thousands and thousands of dollars.