I get your vision and as a fellow Star Wars fan myself, would love to create it.
I understand that you want this to be concept art as if you were to actually build it, thus it must be size. I have the tools, time, and creative experience in order to get this done for you! Firstly, I would find the measurements of a tie fighter and create it in the piece, than I would create stairs in front of it, with people possibly sitting inside of the tie fighter and walking up the stairs.