Beef/chicken/vegi stock, totally. I have to drive 65 miles to the closest store that sells pork stock, but I can get pork bones from my local butcher, so it’s absolutely worth it to make my own pork stock for home made hot and sour soup.
There was a Chinese restaurant in town when I was growing up that used pork stock and I’ve never had hot and sour soup as good as his. Sadly he retired in 2015 and shut down the restaurant.