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The outpost is supposed to be built automatically after 7 days, but only after all the quests in the village are completed (the 4 huts where the peasants live – they are called that because your peasants live there; they are actually just seer huts). If you have already defeated the quest monsters, you won't be able to initiate any dialogue there (you still need to approach and make sure they are satisfied, otherwise they will just sit around doing nothing), but the construction will still begin as it should. Regarding the estate – it is the second city of your faction, located closer to the center of the map. If you capture it, you will receive the treasure (10,000 gold).