In a bowl, whisk together water, honey, and ginger.
Slice one onion and put it in the bottom of the slow cooker.
Put in the pork and put the second sliced onion on top.
Pour honey and ginger water over everything.
Cook on low for 12 hours.
In the last hour, put all ingredients for the BBQ sauce in a saucepan and heat it up, simmering it until blended, about 5-10 minutes.
When the pork is done, take it out and strain the liquid, saving the onions.
Take out the bone (if there is any) and shred the pork with 2 forks, then put it back in the slow cooker with the onions.
Pour in 2 cups of BBQ sauce and stir.
Cook on low for 2-4 more hours.
Serve with more BBQ sauce on the side!
