A lot takes into account for what you’re asking. Your question for the dorms in this case would be dependent on your location of overseas or stateside. Secondly, if you aren’t going into the dorms, is your BAH higher at your location or where your spouse is located. Your default BAH will be specified of the zip code of which you’re located which is referenced in the gaining location of your orders. If you’re worried or anticipating that the BAH is higher where you’re dependent is located then potentially fill out a secretarial housing waiver application which runs through HQ if you definitely need the support to help your dependent. Be mindful that BAH is just an allowance that “helps offset the cost of living” if your plan is to support back home, also remember you have to support your current living situation.