I wonder how many man hours go into a handmade shoe. Ignore leather production, thread production, etc. How many hours does marcel or cliff roberts put in? I'd guess 10, and I think this might be generous.
Clicking - 30 mins. Sewing uppers - 2 hrs. Footbed/welt - 3 hrs. Soles & heels - 2hrs. (don't count glue-drying time, he can do other soles as that takes place). Insoles - 1hr. Finishing - 1.5 hrs.
Idunno how long springline takes to make a bespoke last, but that only needs to be done once.
Any time sitting on the last, etc, is time the artisan can use doing other stuff. Other opinions? I think marcel has a video of the process in general. With his speed I doubt it takes more than 10 hrs/pair. People that have been doing something for a long time can get super speedy. Maybe its 5.
On to economics. If its 10 hrs, and input costs are 200 leather(?), 100 soles(?), 50 miscellaneous, thats 350 cost, 1500 income, 1150 net, 115/hr marginal income/shoe ex lasts. You could use springline last costs to consumer as a proxy for a makers lasts.