There are two thresholds that matter: “rich” is where you no longer have to really think much about money on a day to day basis, and “wealthy” is where you no longer have to work for a living. Both thresholds depend on your expenses and the lifestyle you’re looking for, I guess

1. this will save precisely zero lives
2. you ignore the broader impact of allowing brazen broad-daylight murder to be endorsed by the public under any conditions. It is not just this one life
3. insurance is a mess and I am sure this guy was a dick, and that UHC denies plenty of claims that should be accepted. But at risk of pointing out the obvious, an insurance company that never denies any claims will go bankrupt immediately, and would therefore result in many more deaths since nobody would be covered.