Katanama, the fact that over 40 fo's have resigned from the Freighter fleet during the last 8-10 months. That should give you an idea on how crap the conditions are on the freighter pool and on how short they are on the it as well.
If your family is as important to you as you mention, you also need to think that once you are senior enough to become a captain, there will most probably be no Captain slots for you at home( The bases are really tight for Captains already), so you might have to move your whole family to HKG with its super polluted air.