Reborn: My Frozen Fortress

Reborn Lynn, killed by neighbors in past life during Cryo-Apocalypse. After rebirth, she wins 50 million lottery, buys warehouse, transforms it into indestructible safe house, hoards supplies. After apocalypse, she repels attacks from neighbors, survivor groups, Mercenary Group, original owner. She faces mutated creatures, natural disasters, biological attacks. She saves Mad Scientist's daughter, finds Energy Core to end extreme cold. Activates core, leading survivors to rebuild Earth.