I understand the solar thing--so suppose you're thinking warm parts of the world with lots of sun. It certainly makes sense considering your profession and personal interests.
However, one of the things I'm always amazed by is how many folks want to retire to be in tropical/warm climates even though they've spent their lives living with four seasons. There have been recent studies published that show that people who move FROM a cold climate TO a warm climate when they retire live shorter lives than those who stay in a cold climate after retirement. Interestingly, it doesn't mean they have to stay in the geographic location they lived their working years in--just moving to a known warm climate seems the issue!
A little deeper look shows that those retirees who move to the warm climates (e.g. Florida) are less happy in general than their peers who stayed north (e.g. New Jersey) and they are also less happy than their peers who have always resided in the warmer climates. One of the findings of the studies is that it seems unhappy people live shorter lives and if you're unhappy in the cold you'll likely be unhappy in the warmer climate. Moral of this--as the song says "Don't worry, Be Happy"
I know a few folks who have retired with the benefit of a house or condo in one location and a boat in another. One couple I know has a condo in the Seattle area and a house with boat down in Chile. They do the 1/2 year here-and-there thing. For example, maritime author Roger C Taylor retired with a boat in Maine for use half the year and a canal boat in France for the other half of the year. That sounds wonderful to me.