My Lands: Black Gem Hunting

Thanks, I've ended up trading my resources and playing the waiting game. its timely but I'm okay now, I think I got the gist of it (so far) I thought I completely screwed up my game from the beginning and freaked out but I think I'm safe for now.

Um, I may have messed up when playing and I upgraded some buildings instead of my main hall and now, it's near impossible to gather the necessary materials to advance. Is there any trick to getting past that? So far, I've managed to get enough money by researching some stuff and some quests showed ...