You don't need that much to just survive - food/water, atmosphere, low enough radiation, manageable temperature. All of these problems can be solved with our c

You don't need that much to just survive - food/water, atmosphere, low enough radiation, manageable temperature. All of these problems can be solved with our current level of technology on Mars. After you establish the base near a water source, you can grow your own food, you can make oxygen, you can mine for whatever elements you need. Nobody says it's easy, but it's doable.