Simple as this: Let us set a maximum number of preorders for each trim, on the same screen where we set price and preorder deposit. Maybe default to 12 months’ worth. Once you reach your limit of preorders, you do not receive any more preorders.
…that way I don’t get a billion preorders out of my small factory and have to pay back $31,000,000 when I make my first facelift because somehow people want to wait ten years for my car or something.