I would say that now would be a good time to start. You have 2 years worth of training ahead of you, who is to say that the economy will not have picked up by then and airlines will be in the market again? Also, the airline market is never going to go away, even if there is limited employment, you are going to find a job, even if it is not your first choice, you will get to where you want to be eventually, just not as quick as you may have done in the past.