Staying where you are comfortable and having family and friends nearby, can be an excellent retirement plan.
If you are considering remaining in your home when you retire, it might be a good idea to look at your home from a different point of view, according to The New York Times in "Planning to Age in Place? Find a Contractor Now."
Most homes are not designed and built with the elderly in mind. If nothing else, most homes have far too many stairs that are frequently difficult for elderly people to navigate.
Older homes can be even worse.
For example, many older homes have smaller doorways. Consequently, someone in a wheelchair cannot comfortably get through such doorways, if they can at all.
There are all sorts of things you might not even think about, that can make a home a bad place for an elderly person to live. Therefore, if you would like to stay in your home in your later years, you might want to plan for that now.
Reference: New York Times (May 19, 2017) "Planning to Age in Place? Find a Contractor Now."