“as far as inviting a goy for yom tov meal, wolf is that heter your own, you didn’t see it in a sefer, or did you ask someone?”
I asked a Rav/Posek if it was permissible to invite a goyish in-law into a sukkah for a meal with the family. The answer was that it was a Kiddush Hashem. I don’t know how he would have paskined concerning any stam goy.