Point taken regarding the delay in eligibility for health insurance coverage upon arrival in Canada.
But, in truth, that's not the main point. As a Canadian citizen, I would be ultimately able to get health care that covers pre-existing conditions. If needed, I would of course purchase other health insurance until I become eligible for a provincial health insurance plan, whether in Manitoba, Ontario or elsewhere.
The principal goal of a move to Canada would be the ability to get full health insurance coverage (even after a 3-month or 6-month delay) without incurring the downside of losing U.S. SS benefits. Several immediate family members have retired in Canada for precisely this reason, which gives me some confidence that it can work.
The downside for me is that moving to Canada would complicate my financial life due to the combination of Canadian investment regulations and the tax policies of both nations. It was the contributors to the Financial Wisdom Forum who indicated that renunciation of U.S. citizenship was a far superior option to incurring the onerous taxation that would result from moving to Canada with a low seven figure nest egg.
The suggestion from the FWF brings up the last point: the status of U.S. Social Security benefits in the event of the proposed renunciation. Though I have not researched the matter in extreme detail, the document at the link below supports the notion that SS benefits should be available to a former citizen, though as usual, there are exceptions, and exceptions to the exceptions.
My mother is a former U.S. permanent resident, current Canadian citizen, has no visa status in the U.S. at all (a non-resident alien, I guess), but nevertheless receives U.S. SS benefits while living in downtown Toronto.
My main concern is directed to preserving U.S. SS benefits while becoming eligible for the Canadian/(province-of-choice) health plan. The issue of how quickly one becomes eligible for a provincial health plan is significant, but not the main point.
I have no intention of making this decision lightly or soon, and will seek extensive legal input before moving to Canada.
Thanks to all who contributed.