[KJS]

The only things you can count on are:
a) Businesses for various reasons never want to telegraph bad financial news before it happens for several reasons, so you're dreaming if you think you'll get advance notice of a dealer's closing.
b) ALWAYS leave deposits by credit card. Anyone who remembers the airlines that went bankrupt or out of business will remember that credit card purchasers got their money back.
c) We have not heard a single credible source that has said definitively that a preordered car will always be delivered to another dealer for you if the original dealer goes out of business. There are way to many variables and state laws that regulate what will happen and the conditions under which the dealer went out of business.