Well, its finally done. The tree house is completed, the ladder is up, and the trap door is swinging open. I will gather the pictures and post them as soon as I find the USB cable for the camera.
This project was a beast to say the least. My wife helped me with the last bits; mostly helping heft the walls into place on the platform and general helpy type stuff. Thanks for that honey!
My kids are over the moon about it, so that alone makes all the hard work worth it.
I’m tired from all that work, so I am going to make this a bit shorter then it really deserves, but if you ever want to build a tree house for your kids… call someone else. I’m busy. 
Cheers