Well like I said it has not much to do with actual time. It depends on the time frames in which you are able to advance. There is no way you could advance on a workout to workout basis for very long at this point. So the next question would be how long a time frame you would need. Probably with the right program you could still be very successful doing intermediate programs. But you've gone into advanced so now you may have committed yourself. Hopefully you can keep progressing without your training becoming ridiculously complex
. But lets see how you feel when you're my age...