Rob,
if you ask anyone where they ideally want to live, you'll find common markers such as nice area, safe, peaceful, decent neighbors, etc. For most people, a single family residence beats a condo. So going from the aforementioned requirements, you'll be ending up with a small 1, 2, or 3-bedroom house somewhere. It will have a moderate size and be somewhere between 1,000 and $1,400 square feet. That's the price of admission without being luxurious.
This price can be $70K in Texas or Oregon, $100K in other states, $250K, or $500K, 700K, or even a million in Silicon Valley.
Speaking for myself, living in the Ojai Valley, one of the nicest parts to live in the United States, price of admission is about $550K to $600K. There is nothing meeting the minimum requirements below that price. Since we not only LOVE the climate here, but I'm bound to this location based on my business, selling the house at the time of requirement is part of the plan. Hoping to walk away with about $275K to $300K in equity, and that will be the money for the final, "forever" home. I find it inconceivable to have a mortgage or pay rent in retirement, so there's no way around it. If I lived in an area where houses cost $150K and I had it paid off by the time of retirement, things would look different.