Then he didn't go on a cruise ship instead of a retirement home, he went on a ship instead of getting a carer to pop in.
If that's all it is, they don't need a home at all. Then there's a step up for those who need residential care, then a step up for those who need a nursing home.
Surely he can't have needed that much care? Were they responsible for ensuring he took his medicines, getting him up each morning etc? It doesn't sound anything like a care home.