I'd have to ask my father. I figure if you wanted to go ahead with this that you'd have to get the blessing of the WTS (if you're a JW). There are retirement facilities available in Ontario, Canada. Here is their website: http://www.jah-jireh.on.ca/about-us.html I imagine there is a waiting list. If what I have been reading is accurate about the world's population aging, the WTS may have to reconsider the policy you have outlined.
My financial advisor said retirement homes would be a good investment vehicle as the need just keeps on growing! Haven't done any research on the ROI as the idea doesn't really appeal to me. I tend to be wary of these places in general due to stories from friends who have relatives in them as well as news reports.
It is my understanding that, statistically, elderly people do much better staying in their own homes. As my father ages I keep an eye on him as I expect some services may be needed. I am not sure I could co-habitate with him but it may have to be considered. Maybe there is an opportunity here to start a specialized service to ensure people can stay in their homes but have their needs taken care of (instead of putting them in a foreign place that isn't their own). We do have some community services available in Ontario for the elderly but they are quite minimal, especially if they know that those needing the services have family available. We utilized these services when my mom was still alive.
It has been my experience that as the level of health of the elderly person deteriorates, the local JW congregation will make arrangements to accommodate this, especially if the elderly are 'house bound'. Heaven