I think the question people should be asking is why a very low time ex- Army helicopter pilot is out of the service in the first place. I know that when I wanted to leave back in '88 the Army Air Corps refused to let me go until I had fullfilled my committment.
Instructing over here in North America is nothing like it is in the UK. Low time pilots (fixed and rotary) use instructing as a way to build hours prior to getting jobs in the commercial world.
We, in the UK, are instructors by vocation rather than necessity.