Mom is 88, still spry, drives and lives with my brother; but time marches on.
Brother is 63 and had a serious stroke last year. "Semi-independent" but will likely need lifetime (minor) home support. He has no other relatives than me.
We live less than a quarter mile away.
Fortunately, both of them have a lot financial resources. Mom has an LTC policy and deep pockets. Brother "should" outlive his portfolio, SS and pension even if nursing home eventually comes into the picture. Our plan is that if he doesn't, he'll just deplete his resources (with us filling in some gaps) and head to Medicaid; but that could take 20 years. Two scenarios at that point: He won't make it that long or he'll be too old to care.
DW and I have set up a trust for his care should we both pre-decease. The trust would provide more than enough aid for his lifetime and then some.
Currently he has access to local Elder Services which provide house cleaning and bathing assistance at no cost. They give you a budget of X hours of help based on income and you can choose from a menu on what type of help you need.
When mom passes we're not quite sure what the plan is for my brother. Assisted living of some sort comes to mind. His home is quite large and one option would be to hire a PCA with some free/cheap rent folded into the deal. Strategically, every year that he lives at home increases his chances of not running out of money at the other end.
Living well is the best revenge!
Retired @ 52 in 2005