6 months is a long time, but it is 'do-able'. The armed forces do it all the time, i did twice in my marriage. Can hubby take a 4 week holiday in the middle of the 6 months to break up the time apart? or maybe come out for the last 6 months to shorten it?
Its a hard deciscion to have to make, you know you'll miss him, that goes without saying. What you need to figure out, Is it worth it??

Good luck,
hays