Maybe I've got the wrong end of the stick here Flounce, but it seems like you are looking to the Army as a bit of a life raft in your uncertain times.
The thing is, no matter what Trade you are in, no matter what the housing is like, schools, etc, when you join you are a SOLDIER first. (well, that's what DH told me anyways when he was in )
So, you need to ask yourself: "Do I want to be a Soldier?"
It just seems a bit extreme - and I am saying that in the nicest possible way.
It must be very scary to be facing everything you are against at the minute, but honestly, although the Military is secure job-wise, you have very little control over your life.
My dh left after we had our ds because he couldn't bare to be away from us for months at a time - missing Christmas, birthdays and the births of any future children.
It sounds like you are prepared to work hard - but be honest with yourself - do you really want to be a soldier?
Good Luck