Want to cancel RV sale as wife lost job - how can we?

Read your contract as others have stated, but take a deep breathe and sit down with the dealer ASAP. Explain your situation and emphasize the fact you will not be able to fulfill your commitment if your wife is laid off. Assume they are willing to do the right thing. Also, let them know that when things turn around they will be your dealer of choice.

If things don't go well, then invoke your scorched earth legal moves. Realize the tougher you get the less likely your deposit will be refunded.