[@TruckKun] Uh, my knowledge only comes from stuff like EU4 so its not like I have the knowledge of the gods on that subject but isn't a month a bit quick for a whole galley?

I just asked the AI of course, but apparently a small vessel could take an entire season while a bigger ship could be the work of years. I just think you might want to space out the time especially since like you said, they never built a ship like this before so for the first one no one would really know what they're doing?