A downtime project that takes a year to complete is such a fun idea! It would be so annoying to track in a real game but I almost wish the milestones were more spread out across that time to really make it something to check up on. Still, very fun idea and I love all the different variants you included! The mechanical variety is great but it also adds a lot of texture and flavor to this tradition that makes it feel like a real, in-world thing. Great job!