Old folks homes are routinely $5000/month (usually more) per person. That's without any medical services which cost more. Insurance refuses to pay for them.

Hospice homes are often $8k/month per person. They do charge your insurance. That's actually one of the reasons everyone's insurance is so damn expensive - hospice care is an incredible ripoff. Usually your loved one pays that rate, and they get seen by a doctor once a week and the orderlies and hospice workers see them for maybe 30 minutes a day. Those workers are paid less than $20/hr. The owners make incredible fortunes off of neglect.

I imagine it would depend on where home is to adjust cost of living. In the Northeast United States, just property taxes in many areas run north of $1000 a month with a paid off house, and/or rents are $2000 a month to just maintain shelter(not even heated or with electricity yet, or the side necessities such as insurance and a vehicle/transit pass). The Life at Sea cruise was $2500/month with food and drink included and supposedly competitively priced so I imagine deals like this are not too rare. A couple could spend 60k a year easily being homebodies or traveling the world with a staff available for their requests.