here is another update:
i have added all balconies
took quite time to optimize, because the framerate was so poor that the program almost crashed
now after optimizing, the scene goes very smooth
i have deleted the tiny details on the railings and such, there is nothing special at them because you will almost never see them, those tiny details will be kept at the room ofcourse
some of the walls between each cabin have to be deleted because some rooms occupy a space of 2 rooms like the one im modelling