You don't really need to smoke your pork butt/shoulder for posole. You can braise it. The key is low and slow, so it falls apart. If you braise it, cut it up and sear it first. Then put it in a dutch oven and braise it in the oven or on the stovetop -- whatever you usually do to braise meat.
Hominy is available in every store in Texas, and you can make it from dried corn, but it is a long and tedious process. Maybe you can find it online.
Posole is a good cold weather soup. It is very filling. As you can tell by the spices, it has a pretty complex flavor. You can make it without hot sauce, and put a variety of hot sauces on the table for everyone to decide how hot they want it.
When I make chili or gumbo or pozole, I go on mild side, and put a nice selection of hot sauces on the serving table. People appreciate that.
CD