It seriously looks really good. The only concern I'd have about the door is one of the kids opening it and falling out, but I assume you keep it deadbolted (or locked really well) to prevent that from happening.
A friend and teacher of mine built his own home - by himself. No help from the wife, dad, anything. Bought the land and built it. Took him a while, but he's got one of the most amazing houses I've ever seen. Of course, he's always adding something to it. But he's got a koi pond outside, etc. One story he tells, which I can verify: he never had a skylight in the house. Well, he and his wife were lying in bed one night and she said "Robert, we really should have a skylight here. It'd be nice to look up at the stars from bed." So the next day, she goes to work and he gets out the chainsaw... put in a skylight that day
Did a damn fine job too, just like the rest of the house. And it definitely makes his house that more special to him, as I'm sure yours is to your family. I'd like to do it some day, but I doubt I'll ever have the time - maybe if I'm retired by 40 I can swing it. One can only hope.
Anyway, good luck with it, and keep us updated - it definitely looks like you're making great progress.
Question - how long (weeks, months, etc) have you put in on it so far? And do you have any outside help? Just curious.