Well, I was more optimistic than CMS about the preparation time for accreditation. They have now announced that you must apply for accreditation by January 31st rather than my April prediction. Here is the link:
This leaves very little leeway for those who have not yet started.
The director of ACHC predicts that there are 30,000 DMEs still to be accredited which means over 2,000 per month for the next year. Good luck!