Let me do a quick count and I will get back to you asap.
Edit: I am currently on 152.
If I keep going at my current rate.
It will take another 15 days to meet the requirement in caches.
I can reduce it by 2 days if I get my last 2 alts to max level. Which I intend to, but not as a priority.
Mostly likely, the video will be uploaded on the 15th of Jan and I will compile the stats afterwards