Well, some roads on the Moon require 90h to be repaired, and max upgrades for some facilities take 99h, not mentioning the Ba'al Buster ship with its 100+ levels.
You can't get weapons from the Moon. Its facilities provide parts for special attacks (triggers, status effects, healing effect length and efficiency, attack power bonus, BP bonus, buffs (allies), debuffs (enemies) and the attacks themselves, each weapon has like 3-4 special attacks), and also healing items, catmancer cat treats (the job that lets you teach cats enemy moves, you need cat food to succeed), patissier cake ingredients (self-explanatory, different cakes require different ingredients to be made) and you can also get a bunch of offensive/utility items from the munitions factory as well. Although it is in theory possible to max them out in 3 weeks' span (with over 70 inhabitants, it takes approx. 1h to max upgrade every facility), you won't benefit that much from it. You'll still need to get good equipment yourself to make your special attacks actually useful, and munitions factory/pharm lab merchandise won't carry you all the way to the fight with the kaiser.
(But it is still possible to one-shot bosses when you break the damage limits or have an end-game friend, yesterday I dealt 89k damage to Anne with Tiz, I can upload that into my friend card if you want lol)
You can't get weapons from the Moon. Its facilities provide parts for special attacks (triggers, status effects, healing effect length and efficiency, attack power bonus, BP bonus, buffs (allies), debuffs (enemies) and the attacks themselves, each weapon has like 3-4 special attacks), and also healing items, catmancer cat treats (the job that lets you teach cats enemy moves, you need cat food to succeed), patissier cake ingredients (self-explanatory, different cakes require different ingredients to be made) and you can also get a bunch of offensive/utility items from the munitions factory as well. Although it is in theory possible to max them out in 3 weeks' span (with over 70 inhabitants, it takes approx. 1h to max upgrade every facility), you won't benefit that much from it. You'll still need to get good equipment yourself to make your special attacks actually useful, and munitions factory/pharm lab merchandise won't carry you all the way to the fight with the kaiser.
(But it is still possible to one-shot bosses when you break the damage limits or have an end-game friend, yesterday I dealt 89k damage to Anne with Tiz, I can upload that into my friend card if you want lol)