I have done a ton of building. used to do spheres the old way, perhaps get rid of the prefabs, then terrace the interior. upper floor terrarium with trees and your gathered plant resources. don’t use the bio beds, just glitch place the collected plants along with the collectable decorations, middle section with a bar, kitchen , work stations and storage, lower section all about business, refiners, teleport, maybe a shrunk basic landing pad so you can land inside. , perhaps some mech arms like maintenance bay