There are a bunch of furniture items when you loot a vault (Ancient Cryo Sarcophagi, Fuel Tank, Machinery, Supply Slingshot, etc.) that only weigh 1kg despite clearly being huge devices, and they have market values in the several-hundred range. This allows a pretty huge and I assume unintended increase to your loot from a vault. Overall I'm looking at well over 10,000 in easily carryable loot for a vault which had basically nothing in the way of defences. I'm going to leave the 1kg items since it's clearly unintended, but even so the huge amount of loot items plus the powerful unique furniture items seems like I've used a cheat code here...