Ah, I don't know much about the planks.
Actually, that reminds me. I've run into a bug - the scene where Honey comes to visit you, immediately following the first yuri scene with momo in the bathtub, that one? It concludes by initiating itself again, which breaks things since you have a quest to go outside and find Honey, and then also one to meet her by the front door, and you can't leave through the front door nor get anywhere with the map since you have to meet Honey there, but she's not there.
I can't access the rest of the game because I'm softlocked into the convent.
As for the tree, it averages to around 20 logs, but the seed is determined per-day and seems to be VERY permissive about how high the count can go. Rolling back just allows you to keep the logs you've collected.
With how many logs you can get in a single day - I've personally gotten 67 at the highest - you could probably get to 200 logs relatively quickly, with only a week or so in-game of grinding. Even if you take the average of 20, that's still only 10 days, which isn't too bad.