I have had some bad experiences as well with butchers. Once a buddy and I took a couple young cows to the butcher and took great care with handling the meat. In return we got back something that smelled spoiled, meat with blood clots from the wound, or an older elk. Since then I have processed my own meat.
If you wait for the sales you can find some great deals on grinders, sausage stuffers, and meat slicers. Over the years I have acquired several different pieces of equipment and even upgraded a few. For the longest time I used a hand grinder, which later I upgraded to an electric grinder. In addition, I used an old cast iron Enterprise sausage stuffer a buddy of mine found on ebay for me. Sausage stuffers work great, especially if you want to added cheese chunks to summer sausage or snack sticks. Recently I bought a meat slicer online for about $50 and it has worked great so far for slicing jerky meat and slicing homemade bacon. Hog casings can be ordered online, usually dehydrated which you will have to hydrate, but you can find hydrated ones at the local butcher shop or if you shop around, you can find them fairly cheap. Spices will depend on what you want to do. I prefer A.C. Leggs Old Plantation seasonings. You can find great deals on ColumbiaSpice.com. Once a year I will invite a bunch of hunting buddies over to make sausage. Its a great way to get together, shoot the BS, tell stories, drink barley pop, and make sausage, everything from elk, deer, pheasant, duck, goose, speed goat, yard bird (chicken), and thunder birds (turkey). Last year we made roughly about 600 pounds all together. Doing it yourself is the best way to ensure that your are getting what you want and the quality you want from your harvest. Good luck this year with the hunts.