My Dad didn't want to be a financial burden on us so he chose this place,
https://pvestates.com/live-here/ , which is near you.
I know it is not the same thing as 55+ but there are comparisons.
He worked the small ranch in California and the horse property we had in South Carolina for 40 plus years then some houses in Bend, Oregon and Monument, Colorado.
His desire, he was in his late 70's, was to ease into doing things not attached to a property.
He lived there for six years and we visited every year and he got back here at least once a year.
He wasn't sure he was going to like it but he ended up loving it. There is any number of "VT's at Six" social opportunities but you can pick and choose.
Everything was taken care of and he traveled extensively, rode his Harley on multi-day excursions with friends, fished the lakes near Fairfield, etc.
He did say that the male widowers get hit on harder than a railroad spike.