The meat milk thing is controversial. Exodus 23 says do not boil a kid (baby goat) in the milk of its mother. OK, got it. But what does that have to do with not eating a cheeseburger? The rabbis extended the meaning of this simple sentence to mean not to eat any meat with any cheese, including chicken. That seems a bit absurd. Can't imagine why?
This is akin to shaluach ha kin in Deut 22. Shoo away the mother bird before taking the eggs and you should not eat the mother bird and her eggs in the same meal. However, Jews eat chickens and eggs in the same meal all the time. How could anyone know if the eggs came from the chicken they are eating? You cannot know that.
I'm only saying that several of the rules of Kosher do not make logical sense. So, don't worry about it too much. It's the thought and the effort that counts.
In terms of Kosher chicken or Kosher turkey in a remote rural area, most observant Jews would have their own chickens/turkeys and simply Kosher them by themselves. It is not that hard to do. And it is the only way to be sure of what you are eating.
You can get vegan/vegetarian sausage casings on Amazon which should be good enough. Or Halal, if you are remote and can't get Kosher, Halal is better than pork. Cool man. Keep up the good fight.