How prepared do you actually need to be?
You do not need to buy everything at once. Start with the problem most likely to affect your household, cover the basics, then add redundancy only where it genuinely helps.
Need it now
A storm is coming, the power is already out, or you have a day or two to get ready. Focus on water, food, medications, lighting, charging, weather information and free steps you can take immediately.
Get through a few days
Cover water, food, safe cooking, first aid, communications, temperature control and enough backup power for the loads that truly matter.
Be comfortably prepared
Add more margin: longer food and water reserves, dependable recharging, better communications, generator or power-station capability where useful, and household-specific emergency plans.
Build serious resilience
Add longer-duration energy, meaningful solar recharging, deeper water and food reserves, fuel redundancy, evacuation planning and multiple ways to communicate when normal systems fail.
If you already own something that safely solves the problem, use it. Spend money on actual gaps, not on building an impressive pile of emergency gear.