My condolences for your loss. I think its great that you and your wife are doing this with open arms. I know its going to be tough for your kids at first, but as long as they know they have someone to count on, things will work out.
Korea is a pretty interesting country. What city are you going to live in? My brother and parents live in Seoul (military contractors/civilian), so I visit them once a year. Seoul is a great city. Jerry, I'm sure you know what I'm talking about. It's larger and more densely populated than New York, with more neon than Las Vegas (seriously). You can pretty much find anything in Seoul, and often times the cool electronics come out a full generation ahead of what we have stateside. The subway system is fast, efficient and CLEAN! and there is virtually no violent crime. Seoul is one of the safest big cities to live in.... except for the drivers
. Just take the subway, and stay off the streets... lol... j/k... Its not as bad as I make it out to be.
There's also a lot a fun things to do when you just want to slow down. You can go hiking, sightseeing, visit a 900 year old budhist temple, tons of shopping for the wife and daughter, and my favorite.... go-karting right next to the DMZ. It sounds totally wacko, but there is a go-kart track right next to the demilitarized zone. You can see it on your way to the museum/lookout.
Now on to the r/c side of things. Korea's r/c scene is well established, but like anywhere else, you have do some searching since its a small industry compared to everything else out there. Its home to Academy, Atech, Enerland, Kokam, Hitec, Sky & Tech (Quark), and others. The hobby shops there also carry a lot of Kyosho and Tamiya stuff. I'm sure people there would love to see some 1/8th scale conversions. You'd probably draw a crowd.
Good luck to you in your new life.