Same. I lived in Japan, Taiwan, and mainland China for about 10 years, and I only came back with my wife because we want to buy a house here in the States. After that, we're going back to Japan and China.
The US is so far behind in public infrastructure (trains, pedestrian, cycling, etc) that I can't see the States being a good place NOW, much less the next fifty years.
As a veteran, this sounds effing cool. My engineering expertise is not anywhere near what you're looking for, but I'm gonna keep an eye out for your projec tin the future. It'll be interesting to see what you develop!