Warning, I have no practical input.

I think it is FANTASTIC that you are thinking of competing in the same race. Logistically it might be difficult what with all the training and all but that is so cute. Imagine the different perspectives at the end of the race.

What draws you to Louisville?

And I think you will be each others support group. You might have to figure out a way to do domestic chores but I think it is so wonderful that you want to both race the same IM.

I know there are so many hours of training involved but I think you can do it. And I think if the desire is there, both of you can do it.

Then again, I don't know what I'm talking about. I do periodic web searches of good "first time" IM races and then question my sanity.

Honestly, if you can pull this off, it will be such a fantastic experience for the both of you. I say go for it.