Sukkot

Question

If one does not have his own sukka, but the shul next door built one and serves kiddush and bread for hamotzi ... what is the proper course of action: 1 = make kiddush and eat a k'zayit of bread, go home and continue the meal, including bread and say birkat hamazon after the whole meal is done ? ( what if you need to say kiddush again for your wife ? ) 2 = make kiddush and eat a k'zayit of bread, say birkat hamazon, and then go home and continue the meal ( not including bread ) ? ( what about kiddush for your wife ? ) 3 = if not any of the above 2 options, please describe in detail what the proper course of action is. Thank you and happy holiday !