What’s got four wheels, holds three car seats, and isn’t a minivan?

We’ve got two kids under four, a hatchback, and my wife just let me know I’ve slipped one past the goalie. I’m not sure I can MacGyver my way around the fact that there’s not enough space for the third car seat.

She hasn’t been afraid to let me know she’d like a Toyota Alphard but I’m loathe to get a minivan. Are there some good (budget) alternatives I can counter with?