You can move to somewhere that has a lower cost of living. It's not unusual at all for people to move when they retire. There's a whole big amazing world out there and one of the best decisions I ever made was squeezing in enough travel when I was young, that it totally altered my mindset.
(That, and reading The 4 Hour Workweek. Once Tim Ferriss became famous, legions of people picked it apart and called him a bullshit artist. I took inspiration from that book, and went and lived it. 20 years after he published it I bumped into him completely by chance in a cafe in Phuket Thailand, which was an incredible moment, here were two guys, for decades just doing the thing that everyone had said was impossible or impractical, and we were two of the first to have the exact same idea and end up in the exact same place once Covid restrictions started to relax around the globe.)
I'll grant that kids significantly alter the numbers.