Wow, great stuff there. I like the internal view especially. I used to make those kinds of things with a 3D app for play but they used to take ages to render. Things are a bit faster now tho.
You could have submitted a castle like that in our monthly challenge and last month had a prize. This months one does too but its not just a habitation any more but check it out and see if you can win some stuff.
Great work - will be seeing more I hope.