Coruscant Tier Height?

[Crocodile]

Vertically, it'd probably fit fine. Horizontally? Well, Tier 5 is about as cramped for space as any large city. You'll be doing some demolition to make way for your skyscraper. Assuming you don't mind your place being constantly hassled by the dregs of society, gangs, and other riff raff, you're fine to create your Base there. Just be realistic about it. Seckies are gonna be pissed that you kicked them out of their homes to build a gaudy place just for you (and whoever you decide to populate it with). Gangs are gonna see it as an easy mark until you show them otherwise, and then they'll likely just be more clandestine in robbing ya, take pot shots, or just gather a mob. Tier 5 isn't a great place to stand out from the crowd.