Matt, I have no clue? I started loading mine 11-12 years ago. Just finished the first box of 500 wads I bought from Tommy. I load nothing but 20ga, most for me and the kids. And have several buds that I load for. I could not fathom what it would cost for 500 store bought TSS. Don't get me wrong I do have some money invested in shot over the years. Just ordered 15 more pounds.
Just loading for your self? Initial buy in. Roll crimper, hull trimmer, scale, hulls, wads, nitro cards and over shot cards. You might have 200.00 in that. And shot is 40.00 a pound. Off the shelf 20ga are 50.00 ish per 5, you can figure that one out.