In my opinion, the United States is the fastest place to grow a stache, due to the very high salaries and low taxes, but once you are retired, there are lots of cheaper places to live, like China, Thailand, Mexico, Guatemala, etc. if I didn't have ties to the U.S. I would leave it when I got enough money to retire, however I have a lot of family and friends here so I'll stay here. You should make a pros and cons chart of United States and UK, and choose what is most important to you and your husband.