I feel so much less stressed now!
What we're going to do is just skip the window, keep the baby in our room, and get me a new tri bike! :)
What we've really decided to do is go with the cheaper window that's big enough to be safe, but not necessarily to code. We've told the contractor that we want to do it, but he's been busy so who knows when it will actually get done.
I'm not going to worry about it any more.
Several people suggested just keeping the baby in our room, and I guess I had just ruled that out since I'm such a light sleeper and have trouble sleeping with a baby in the same room as me. I just wake up at every little grunt or movement the baby makes, and end up constantly checking on them all night. If they're in the next room over, I can hear them cry, but at least get some sleep in-between feedings. Maybe this baby will be a really quiet sleeper, or maybe I'll just get used to it. If not, it won't be for very long since we will get the window in and move the girls downstairs eventually.
Besides, won't it be so cute to have a little baby in our room with us?! He's going to be so little!