i came acros that guy to, if u say yes, after a while (when ur close to leaving broken valley) he wil rush onto you agian. saying: the bricks i wanted to buy arent there anymore, so i had to buy a more xpensive sort, wich wil cost you 500 gold more. thats all i heard from him since, but after you get the battle tower, broken valley wil be raided and totaly toxid by damian. so wil your house stil be there after that is solved later on in the game? i dont know. so id say its totaly up to you!