For further reference, I just ran 120 SoT (plus whatever you generate while running) through Words of Warning. I didnt keep track of total runs or anything, it was on auto while I worked. I lost 3 times but I have included an extra 78k gold as compensation for proper results (approx 26k per run) assuming you wouldnt fail with the correct team. My team was FFE, KP, Ferryman. Sleep seems to be an issue, perhaps an anti-sleep character would be helpful, maybe even witchdoctor, instead of Ferryman...
Anyway, here are my results:
I started with 16.54M gold
Including the 78k add I would have ended at 17.01M gold or an increase of 470k
I then sold the 4* talismans I dropped (only 2 which is actually a bit low) for another 135,324 gold
I would expect approx 670k gold per 120 SoT assuming you sell all talisman and assuming average (3) talisman drops.
Oh and my average time per run is 1:30 best time is 1:07 with this team.