Thinking about those a bit more mature than I and living challenges.
I wonder if someone is maybe missing an opportunity.
What if some agency offered a matching service. Older person living alone has need for companionship and assistance, available space, but perhaps tight on finances. Younger person has need of living space, is a responsible person, limited income.
Agency could effect a matching service with defined oversight (to protect the mature client) for a nominal monthly fee paid by each, based on situation. Each situation tailored accordingly as far as financial contribution vs services. Surely there are enough potential clients on each side of issue.
Agency could be local Office of Aging, a home care service, rental agency, a dedicated service, seems like a flexible situation.
One of my considerations for a caretaker when Sophie is ready is to contact the university and offer the studio as a housing alternative for a student with flexible mix of rental/work trade. Similar concept could work just for general assistance.
Properly vetted I could even see this in select homeless situations.
Oversight for protection of the elder paramount.