great chapter, good way of writing the characters and their personalities, along with interesting logic and plot. This is the best modern family fanfic I found.
please don't try to have him be there for every single episode, it'll be weird if he is. the first 5 or 6 chapter were the best and they were your original, so don't be afraid to do your own thing.
Are you going to make him move? I think it's cool if he stays and interacts more with the family, but for him to move out and then come back is a good way for him to be able to have a relationship with Alex or Haley, since they are so young now