Believe it or not, I used AI to help me work out the costs and savings... Tell it the price of all the kit and each component, the multiples you can buy components in, account for the ability to re-use cases, once-fired brass already owned, price per round of factory ammo, the quantity of each used over a year, blah blah blah
In the end it told me the exact minimum I'd have to spend initially, the number of each type of ammo I could make from that, savings and ongoing costs for year one, two, three, etc...
Geeky on my part perhaps, but very clever tech to work it all out and present the answers in clear format