My suggestion is that they might try renting a boat or an RV for several months before making a larger commitment. And they should investigate retirement communities, which vary greatly in what they offer.
My mother is in such a place and loves it. She has a two bedroom apartment on a lake in Winter Park, which is an upscale city just north of Orlando. My mother sets her schedule and activities and usually fixes her own meals. Yet if she wants to eat in the cafeteria or needs minor medical help, they are in the building next door -- which is connected to hers by a covered walkway. A panic button system has emergency help from staff available at all hours. A full hospital is a couple of hundred yards down the road.
Continuity of care is provided, from temporary nursing help to hospice care. The retirement community has many organized activities, but my mother is healthy enough that she frequently drives to shop, visit friends, or see movies and plays. She sometimes even goes to lectures at the nearby college.
Sounds nice for those who need a less strenuous lifestyle. In my friends case, they want to go for a bit more travel/adventure before completely settling down. But it's certainly something to plan for, in their future.