A Balancing Act

We all have our list of things that we want to do before "x" age. As I get closer to my 30 mark, I've eliminated the unimportant markers (like owning a Jag - why I wanted this, who knows) and only two major markers remain - an ironman and having a baby. Obviously, the two don't really go well together and it will be far easier to do the former before doing the latter. That said, I've been thinking about IM Florida in November. As of last week, the work conflict was removed and the only thing holding me back was the training (and the related time commitment).
This past weekend, I pulled out the Beginner Triathlete full IM training plan and started making my own. Depending upon what happens over the next six weeks will determine what we (James and I) decide for the race. I cannot do this without his full support and understanding of the time commitment. In discussing my initial schedule (which has me doing 4 weekday pm workouts and long bikes and runs on the weekends), he was a bit concerned about losing every weeknight and chunks of the weekend. I'm going to have to adjust and get as many workouts in during the early morning hours (even though I loathe pre-dawn biking).
How do people with spouses, children, and full-time jobs do this? I'm having problems just balancing my work and my wonderful husband. I suppose you learn to embrace the AM even more and learn how to push yourself (rather than always training with a group). I think that I will have to learn how to ride by myself and find some safe routes that are not 60 miles from my house. This is all possible, right? I can do this...