I never gave this much thought. Let me think for a minute;
1. I may spend a couple of hours sorting a 5 gallon bucket of wheel weights.
2. Maybe 2 or 3 hours to smelt. I smelt in batches of 300-400#. The time depends on how dirty the lead is.
3. With a 2 cavity mold, I may cast 8 bullets a minute.
4. I probably can size 10 or 12 bullets a minute on my Lyman sizer.
5. I probably can load 200-300 shells an hour on my Dillon at a sustained rate, and more than that on short runs.
I've never really timed any of this, except for smelting. Not really timing that, I just know about how much time I spend in the shop on those days. The sorting, smelting and casting time depends on the type of lead, (how dirty it is) type of bullet and the mold. The sizing and loading probably vary less. Like others have said, its a labor of love. If you count your time, don't do it! Like many others, I get a lot of satisfaction of seeing a nice bullet come from a pile of dirty lead and the journey from one to the other.