One is the Coy HQ and the other is the Div Int Cell.
The best bet is to give them a ring and ask them direct. Generally its good and busy.
Life in Germany is good. Cheap booze, cheap fags and cars. Herford is a nice town, though a bit limited in nights out, but it has a bustling cafe society. Bielefeld is 10km away and is better. Hannover is 1hr away (nearest int airport), and berlin easily accessible by train (4hrs).
Your accom will be 1-2miles from town centre and train station. Use of section car to get you from accom to work, (sperate camps). Accom not shared by signallers, you live in an Int Corps building almost like a flat.
That was the sit approx 18mnths ago, but as I said the best bet is to ring, introduce yourself and ask to speak to one of the other jnrs there to get the ish.
Yeah you can live out if you wish. Don't know the rental rates (it would depend on what size shagging palace you require). Live in the accom initially, get permission (a formality), and look for a suitable location. Several people have done it before so there should be no hiccups.