Yep, perhaps a bit of rethink. Get yourself an older robust 7 seater (troopy, 100s series, patrol, cruiser, whatever) and then upgrade the family vehicle to something Sarah can comfortably drive day to day (Carnival, Territory, Tarago, people mover whatever).
Airbags aren't largely designed for people in seats as @Fabulous suggests and kids should be well restrained and protected within them regardless. More important once they become bigger kids. If it's a short trip anyhow, you could feasibly take two cars and still be well ahead even considering fuel costs over an expensive new car. Longer trips you can still take one.
Then when the kids are out of seats, you are only upgrading an older tractor which owes you nothing.
Just a thought anyhow.
Dave, is that offer open to anyone :rolleyes: