I don't find that I need to set boundaries too many times with my AH. When I do, it's for my protection or to maintain peace in our home. A boundary for protection would be something like always saying no to helping him do any type of work around our home that he should not be doing while drinking (my being around him while he's on a riding lawn mower). A boundary to maintain peace would be, if my husband decided to get ugly around me or the children I will say "stop it" and if that doesn't work, I will leave (another part of the home or further if necessary).
I don't plan boundaries, I apply them as needed.
(((((hugs)))))
Terry