Mullen,
I have great results by simply cutting the pork butt into chunks, add salt and pepper to all sides, then searing all sides in a hot pan:
Set aside the seared proteins and then saute chopped onions, celery, carrots in the same pan (add oil and salt & pepper), cook until veges are tender, then add some tomato paste, garlic cloves (caramelize a bit), add white wine if pork (& red wine if beef) and reduce wine:
then add stock or water (several quarts so the seared proteins are well covered in the oven pan). Put the chunks of pre seared pork in a 4+ inch deep oven pan, pour in all the veges and liquid above, throw in some fresh thyme on top, cover tightly with foil and then throw it in the oven for 4-6 hours at 350F (check the meat until its at desired tenderness and you're done).
Strain the juices (toss vege) and reduce with butter to make a sauce or add cider vinegar, tomato paste, brown sugar, mustard, etc to create a BBQ sauce.
This works like a champ for me with pork butt, beef short ribs, chuck roast, pork cheeks then any of the above can be used for sandwiches or a protein on top of pureed cauliflower (or potato or parsnips or celery root or you can combine all 4).
Here's pork cheeks with the sauced reduced with butter on top of celery root puree:
Here's short rib sliders with arugula, goat cheese, sauce reduction and pickled shallots:
Here's the pork used for tacos:
The proteins cooked this way (& sauces) can be used for a variety of dishes, lot of bang for your time buck