I'm here.

10MM load data. I've got more of it than you can shake a stick at, from mild to ultra-wild. . . . the ultra-wild I invented myself and proofed myself, it is not conceptual.

Cost. That is virtually impossible for anyone but you to determine because the for real volume you foresee loading will determine everything from startup cost to component cost. I can tell you for certain that the more you load the cheaper per round produced costs. Oh, and there is an unforeseen that will affect your real volume calculation:

Reloading, load development, shooting the 10mm, is addictive. Very addictive. So in good conscience my best suggestion is that you make your best estimate on the volume of ammo you foresee producing . . . and then double it.

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It is frequently put forth that reloading your own ammo saves money. Usually a $1.00 cartridge costs you about 50-60 cents to load yourself. But you won't save money, you will spend the same $1.00, and shoot twice as much.