UK Family of Four Needs £5,000 for 'Extreme' Emergency Fund in the Event of War Rowan MacKenzie, a doomsday prepper, has revealed essential goods every family should buy in case disaster strikes, including a collection of different power sources, shelf-stable foods, and vital documents. She also warned against common mistakes people make when preparing for emergencies, such as stockpiling food that is never eaten and not including water purifiers in their stockpile. A doomsday prepper who built an 'extreme' home bunker with 315,000 pound worth of emergency supplies has revealed that a family of four will need at least 5,000 pounds in starter cash if the UK goes to war. Estate agent Rowan MacKenzie, from Missouri, US, said the money would buy one month's supply of food, water, and supplies, plus a portable emergency kit or bug-out bag. The average UK adult has 19,214 pounds in savings, but there's a huge discrepancy across generations, according to 2026 research by Finder. Those under 55 have just 9,888 pounds, while 39 percent have 1,000 pounds or less.Rowan, who was mocked for her intense preparedness, said she's now constantly being approached for advice on how to stay safe as tensions escalate across the globe.