Hey i like what you're doing and i think this could go very well and look brilliant in the future of when it is finnished and stuff like that. Just a few pointers though try and add some variation into the walls having flat walls makes a building look a bit boring when it is on a scale of this, From what i saw on a picture there i saw there seems to be alot of variation in all of the walls. Another thing is try using some different block types try to block that are similar and one that isn't i normally find that this is a good mix of blocks for one building.They are justa few pointers i would use to make not only this build better but you a better builder too.

-Jedcape-
P.S check out a few of my buiilds i have done