I would second the comments made regarding retiring in a location with good health care, as well as nearby photographic opportunities. Not being winter people, my wife and I moved to Ivins (St. George)Utah from Park City, Utah about twelve years ago. Issues of air pollution and the funding of the Lake Powell to St. George pipeline aside, health care in St. George is excellent. Lots of specialist practices exist for the needs of the geriatric along with a regional health care facility operated by Intermountain Health Care, including a satellite facility of the Huntsman Cancer Center. Health care in St. George is on a par with any metropolitan center in the mountain west. The proximity to Zion, Bryce, Cedar Breaks, Grand Canyon north rim, Death Valley, Valley of Fire, Four Corners, make it an exceptional location for photographers.
The St. George airport now has jet service connections to Salt Lake City, Denver and LA, and St. George is a two hours drive from McCarran International Airport in Las Vegas with large numbers of daily direct flights to Europe, Asia, etc.
All that said, my wife and I developed allergies to the desert dust and air pollution and moved 2.5 years ago to Hawaii. We still have our ties to Utah and direct flights to Salt Lake or Las Vegas make travel back to Utah for photography relatively easy and quick. Plus our location here make flights to NZ, Australia and other areas in Asia and the Pacific, considerably shorter than flying from the US mainland.
I do wish to make a comment replying to the negative comments regarding Airbnb. Not all Airbnb rentals are necessarily bad. Certainly they can impact certain areas but no more so than vacation rental condos operated by management companies and they can fill a need in some areas. When my wife and I moved to Hawaii we purchased a new home and constructed an Airbnb/VRBO guest house for short term vacation rentals and we purposely designed it for visiting photographers. In the case of the east side of the Big Island, there is a shortage of decent, affordable hotel rooms, with most of the resorts located on the Kona side. Because of the lava flow and huge number of visitors to Hawaii Volcanoes National Park and the other attractions on the windward side of the Big Island, it would now be impossible to handle the demand without Airbnb/VRBO rentals.