Construction yard. Anchor then pop bolts. Comes with a simple harvester. Sell resources and buy blocks for a base with the payload terminal. Not the most practical, but I love the concept.
All hail the Lemon Kingdom
As a "Gift" I have this heavy Tank to offer. The Tower ist 360° turnable and the main howitzer can also be angled. As long as the batteries last, this tank is invulnerable to any conventinel attack. Mods used: Saelems Blocks and Controll Blocks (TTMM).