Alright I reworked the Watch Tower, following duplication materials some snapping and Transforms as per the course.
I replaced the Roof and changed its overall design.
Also I redid the Floor of the Tower using proper supports and planks, and Reinforced the overall frame in more realistic way, engineering wise.
And finally this is the scene (cycles rendered) so far, I plan to add other elements as we go along.
Cheers!