If I can reserve something, its functionally for sale, I should be able to see how much the total price of the vehicle is before reserving. I tried that, the reservation link seems broken.
$5,000 is an incredible amount of money. If I were to spend that amount on a pre-order, I deserve to know what I'm paying for and how much it will cost me.
You have 14 days to decide once your number is called. Put the deposit on a new credit card with multiple bonus points in the first month. Get yourself a vacation for lending someone $5,000 when interest rates are so low and decide later.