Just one 140.6 - Florida. Had to wait until off primary call to get the training in for that distance. Have CDA and IMoo this year (that is if I don't get a lottery slot this Thursday
). Running was early morning and Bike training was at night/weekends. If you are doing it on a trainer, you can get a serious workout in a few hours on the weekend - 3 x 20 minute intervals at FTP, 3 x 20 minute intervals at 90% FTP then 3 x 20 minute intervals at 85% FTP. 5 minutes at 70% between intervals and 10 minutes between sets. Killer workout. You're done in 4 hours and have done far more work than people out there going 6+ hours on the weekend (which ends up being 8+ by the time you count getting to the meeting point, breaks every 30 miles, etc). Get a Computrainer or Powertap - well worth the investment.
We had one medical student who did 4 IM's AND worked full-time on top of medical school. I think he's up to 85-90 marathons at this point. THAT guy is crazy - we train together often and he tears me up.