Global Freeze: My Safe House Can Be Infinitely Upgraded

[Rebirth at the Doomsday + Decisive Killing + Unlimited Upgrades + Stocking Up + Revenge of Not the Virgin] In the last life, the sun went dormant, the world was frozen, and the doomsday came at minus 120 degrees! My kind-hearted Virgin Girlfriend opened the door and ushered in a bunch of beasts. They robbed me of all my supplies, broke my legs, and threw me in the ice and snow to freeze to death! Once reborn, return to the 72 hours before the end! My girlfriend once again advised me to be kind and asked me to distribute supplies to my neighbors? "Divide, it must be divided! You and your family should get out and share with them!" I slapped her and her family out of the house! Turn around to activate [Unlimited Upgradeable Safe House System]! Spent all their wealth, took out millions in loans, and hoarded supplies like crazy! Bite! Level 1 safe house: bulletproof glass + geothermal heating! [Ding! Level 2 safe house: automatic defense machine gun + electric protective net! [Ding! Level 3 safe house: ecological recycling farm + water purification! ... [Ding! Final form: Planetary Mobile Fortress! When the doomsday comes, the world turns into a living hell, and everyone freezes into ice sculptures. And I was lying leisurely in the warm and spring-like safe house, eating hot pot and drinking red wine. The neighbor who once laughed at me is now kneeling outside my door, kowtowing until he bleeds, just asking for a mouthful of hot soup. And the ex-girlfriend who killed me was even more naked and turned purple from the cold. She was crying and begging me to open the door! "Open the door? Okay." "If you want to enter my house, you have to risk your life first!" In this life, I only believe in one truth: in the last days, kindness is the greatest cruelty to oneself!