My Mums old neighbour lost his wife shortly after he retired, told his son that he was selling up and he'd calculated that he had enough funds to remain at sea on cruises until he was 88 and after that he said the council can look after him! Mum gets a postcode now and then

There was a similar person on the QE2. An elderly (80+ when I met her) lady who’s husband had died ( I think whilst on the ship). She had an arrangement with Cunard to stay on board. She basically travelled the world in a 5 star care home, visiting friends and relatives round the world. She did have to spend a minimum time off the ship to maintain citizenship. Working on the basis of £80-100 per day for a normal cruise that seemed a good deal for that level of accommodation, food, entertainment, travel, service.