This article suggest that continuing care retirement communities have become more common. While expensive, they offer many amenities as well as long term care
Erickson, Mary Anne and Krout, John A.
"Planning and Experiencing the Move to a Continuing Care Retirement,"
Marquette Elder's Advisor: Vol. 3
, Article 4.
Available at: http://scholarship.law.marquette.edu/elders/vol3/iss2/4