You can get away with a single stage or turrent press for .243, 270, and .308. I assume you want quality over quantity with these cartridges. I can load 50 rounds an hour with a single stage and they get good quality control.

Not sure how many 9mm rounds you shoot that will make a difference in the press you need. Spending 4 hours at the press to get 200 rounds of 9mm that gets shot up in 5-15 minutes would be frustrating.

I am to the point where I use balance beam scales plus digital scales and dial calipers plus digital calipers to make sure my measuring devices are accurate. This is mostly for hunting rounds that get loaded hot and precise.

Make sure your family or anyone else makes an honest attempt to return brass from the reloads you make them. It is going to get costly if you are replacing stockpiles of brass that got lost after the first loading.