My mother has made Kielbasa every Easter and Christmas, back in Ukraine. The process included my father preparing a pig and then in evening chopping meat for kielbasa. Process here is not nearly as hard, I love making homemade sausage and freezing some for a busy day.
In most cases, I make my own ground meat. I usually buy a whole lot, when it's on sale. My Kitchen Aid Grinder and Kitchen Aid Mixercame in handy. There is an option to buy Kitchen Aid Sausage Stuffer Kit on amazon, but I used an old fashion way just like my mother did.
Sausage casings are not sold in all stores. I have found some at Whole foods and a local meat store. I would suggest asking your meat butcher if they carry the sausage casings.