How long can you keep it on layaway? How much savings do you have or can get by okay with your wife's salary? Are you in a career that you will find a job fairly quickly?
If you can won't be starving when you buy the bike, get it.. I was layed off 2 years ago and because of the economy, it took me 4 months to find a comparable job. You have to do something you enjoy besides worry about finding a job..