I got into CASS a little over 2 years ago and started from scratch. Fortunately i had some good guidance.
I started out with:
1) SASS Vaqueros is 357/38 (4.62 inch barrels)
2) Cody Conagher 73 357/38
3) Marlin 94 357/38 (back up)
5) Stoerger Coach 12 guage
6) Leather (holster/shot gun belt)
7) Collapsible gun cart
Although all the equipment is very important, I would not go cheap on leather. High quality and personally tailored to fit you is what I reccomend. All of my guns were worked over from the get go which I think is a wise investment. Although I have never had to use my back up Marlin 94 at a shoot, it provides me with a sense of security. I frequently see rifles go down during a shoot.
After the first year I purchased a Dillion press and started reloading, definitely a cost saver in long run if you shoot often.
Good luck on your journey.