Gina - don't stress on the Chi. Something similar may come your way. I looked at their website, and you are right, no instructors in Iowa. If you wanted to think about doing a workshop someplace together I would be up for it - just get your foot back first. You may also be able to find a Physical Therapist who can work with you on posture and gait. My PT was the one who told me about Chi.
There is also a DVD available, but I haven't seen it. Might be on Netflicks?
As far as the TBDS, this is your plan. If you felt you missed by being away this weekend, I say go back to Day 4 and re-start from there. In her book she says there is no right way to do this. You may need to spend a few days on one step before you move to the next. You may be able to do a few steps together. You know yourself best and if you feel you "missed", stay on Day 4 until you feel ready to move. I will say that Days 4 and 5 have been the best for me so far, and it is only 9am on Day 5.

I say slow down and enjoy the changes you are learning. This is not a race.
Off to my workout. I'll update my LJ later today.